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Vulnerability Details :

CVE-2020-6820

Summary
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At-24 Apr, 2020 | 15:56
Updated At-30 Jul, 2025 | 01:45
Rejected At-
Credits

Mozilla Firefox And Thunderbird Use-After-Free Vulnerability

Mozilla Firefox and Thunderbird contain a race condition vulnerability when handling a ReadableStream under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Known Exploited Vulnerabilities (KEV)
cisa.gov
Vendor:
Mozilla CorporationMozilla
Product:Firefox and Thunderbird
Added At:03 Nov, 2021
Due At:03 May, 2022

Mozilla Firefox And Thunderbird Use-After-Free Vulnerability

Mozilla Firefox and Thunderbird contain a race condition vulnerability when handling a ReadableStream under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.

Used in Ransomware

:

Unknown

CWE

:
CWE-362

Required Action:

Apply updates per vendor instructions.

Additional Notes:

https://nvd.nist.gov/vuln/detail/CVE-2020-6820
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mozilla
Assigner Org ID:f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At:24 Apr, 2020 | 15:56
Updated At:30 Jul, 2025 | 01:45
Rejected At:
▼CVE Numbering Authority (CNA)

Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Affected
  • From unspecified before 68.7.0 (custom)
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Affected
  • From unspecified before 74.0.1 (custom)
Vendor
Mozilla CorporationMozilla
Product
Firefox ESR
Versions
Affected
  • From unspecified before 68.6.1 (custom)
Problem Types
TypeCWE IDDescription
textN/AUse-after-free when handling a ReadableStream
Type: text
CWE ID: N/A
Description: Use-after-free when handling a ReadableStream
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.mozilla.org/security/advisories/mfsa2020-14/
x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2020-11/
x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1626728
x_refsource_MISC
https://usn.ubuntu.com/4335-1/
vendor-advisory
x_refsource_UBUNTU
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-14/
Resource:
x_refsource_MISC
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-11/
Resource:
x_refsource_MISC
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1626728
Resource:
x_refsource_MISC
Hyperlink: https://usn.ubuntu.com/4335-1/
Resource:
vendor-advisory
x_refsource_UBUNTU
▼Authorized Data Publishers (ADP)
1. CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://www.mozilla.org/security/advisories/mfsa2020-14/
x_refsource_MISC
x_transferred
https://www.mozilla.org/security/advisories/mfsa2020-11/
x_refsource_MISC
x_transferred
https://bugzilla.mozilla.org/show_bug.cgi?id=1626728
x_refsource_MISC
x_transferred
https://usn.ubuntu.com/4335-1/
vendor-advisory
x_refsource_UBUNTU
x_transferred
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-14/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-11/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1626728
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://usn.ubuntu.com/4335-1/
Resource:
vendor-advisory
x_refsource_UBUNTU
x_transferred
2. CISA ADP Vulnrichment
Affected Products
Problem Types
TypeCWE IDDescription
CWECWE-362CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Type: CWE
CWE ID: CWE-362
Description: CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Metrics
VersionBase scoreBase severityVector
3.18.1HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Metrics Other Info
kev
dateAdded:
2021-11-03
reference:
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-6820
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
CVE-2020-6820 added to CISA KEV2021-11-03 00:00:00
Event: CVE-2020-6820 added to CISA KEV
Date: 2021-11-03 00:00:00
Replaced By

Rejected Reason

References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@mozilla.org
Published At:24 Apr, 2020 | 16:15
Updated At:21 Mar, 2025 | 20:01

Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
2021-11-032022-05-03Mozilla Firefox And Thunderbird Use-After-Free VulnerabilityApply updates per vendor instructions.
Date Added: 2021-11-03
Due Date: 2022-05-03
Vulnerability Name: Mozilla Firefox And Thunderbird Use-After-Free Vulnerability
Required Action: Apply updates per vendor instructions.
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.1HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Secondary3.18.1HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary2.06.8MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
Type: Primary
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.1
Base score: 8.1
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Primary
Version: 2.0
Base score: 6.8
Base severity: MEDIUM
Vector:
AV:N/AC:M/Au:N/C:P/I:P/A:P
CPE Matches

Mozilla Corporation
mozilla
>>firefox>>Versions before 74.0.1(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Mozilla Corporation
mozilla
>>firefox_esr>>Versions before 68.6.1(exclusive)
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions before 68.7.0(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-362Primarynvd@nist.gov
CWE-362Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-362
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-362
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://bugzilla.mozilla.org/show_bug.cgi?id=1626728security@mozilla.org
Issue Tracking
Permissions Required
https://usn.ubuntu.com/4335-1/security@mozilla.org
Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-11/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-14/security@mozilla.org
Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1626728af854a3a-2127-422b-91ae-364da2661108
Issue Tracking
Permissions Required
https://usn.ubuntu.com/4335-1/af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-11/af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-14/af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1626728
Source: security@mozilla.org
Resource:
Issue Tracking
Permissions Required
Hyperlink: https://usn.ubuntu.com/4335-1/
Source: security@mozilla.org
Resource:
Third Party Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-11/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-14/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1626728
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Issue Tracking
Permissions Required
Hyperlink: https://usn.ubuntu.com/4335-1/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Third Party Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-11/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2020-14/
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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Matching Score-8
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EPSS-0.35% / 56.70%
||
7 Day CHG~0.00%
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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

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Incorrect Conversion between Numeric Types
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Matching Score-8
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-8
Assigner-Red Hat, Inc.
CVSS Score-6.8||MEDIUM
EPSS-24.27% / 95.87%
||
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Updated-03 Apr, 2025 | 01:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

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CVE-2021-23994
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.37% / 58.26%
||
7 Day CHG~0.00%
Published-24 Jun, 2021 | 13:26
Updated-03 Aug, 2024 | 19:14
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrThunderbirdFirefox ESRFirefox
CWE ID-CWE-909
Missing Initialization of Resource
CVE-2016-2798
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.79% / 72.88%
||
7 Day CHG~0.00%
Published-13 Mar, 2016 | 18:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The graphite2::GlyphCache::Loader::Loader function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to cause a denial of service (buffer over-read) or possibly have unspecified other impact via a crafted Graphite smart font.

Action-Not Available
Vendor-siln/aMozilla CorporationopenSUSESUSEOracle Corporation
Product-leapfirefoxopensusegraphite2linuxlinux_enterprisen/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2016-2792
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.79% / 72.88%
||
7 Day CHG~0.00%
Published-13 Mar, 2016 | 18:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The graphite2::Slot::getAttr function in Slot.cpp in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to cause a denial of service (buffer over-read) or possibly have unspecified other impact via a crafted Graphite smart font, a different vulnerability than CVE-2016-2800.

Action-Not Available
Vendor-siln/aMozilla CorporationopenSUSESUSEOracle Corporation
Product-leapfirefoxopensusegraphite2linuxlinux_enterprisen/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2019-11746
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.65% / 69.94%
||
7 Day CHG~0.00%
Published-27 Sep, 2019 | 17:16
Updated-04 Aug, 2024 | 23:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A use-after-free vulnerability can occur while manipulating video elements if the body is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-416
Use After Free
CVE-2019-11759
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-3.35% / 86.80%
||
7 Day CHG~0.00%
Published-08 Jan, 2020 | 19:48
Updated-04 Aug, 2024 | 23:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

An attacker could have caused 4 bytes of HMAC output to be written past the end of a buffer stored on the stack. This could be used by an attacker to execute arbitrary code or more likely lead to a crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2016-1977
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.96% / 75.60%
||
7 Day CHG~0.00%
Published-13 Mar, 2016 | 18:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The Machine::Code::decoder::analysis::set_ref function in Graphite 2 before 1.3.6, as used in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7, allows remote attackers to execute arbitrary code or cause a denial of service (stack memory corruption) via a crafted Graphite smart font.

Action-Not Available
Vendor-siln/aMozilla CorporationopenSUSESUSEOracle Corporation
Product-leapopensusefirefoxgraphite2linuxlinux_enterprisen/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2016-1979
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.91% / 74.80%
||
7 Day CHG~0.00%
Published-13 Mar, 2016 | 18:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Use-after-free vulnerability in the PK11_ImportDERPrivateKeyInfoAndReturnKey function in Mozilla Network Security Services (NSS) before 3.21.1, as used in Mozilla Firefox before 45.0, allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted key data with DER encoding.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-network_security_servicesfirefoxn/a
CVE-2016-2835
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.62% / 69.09%
||
7 Day CHG~0.00%
Published-05 Aug, 2016 | 01:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 48.0 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxn/a
CVE-2016-2838
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.22% / 78.20%
||
7 Day CHG~0.00%
Published-05 Aug, 2016 | 01:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Heap-based buffer overflow in the nsBidi::BracketData::AddOpening function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via directional content in an SVG document.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxn/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2016-2837
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.3||MEDIUM
EPSS-0.46% / 63.04%
||
7 Day CHG~0.00%
Published-05 Aug, 2016 | 01:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Heap-based buffer overflow in the ClearKey Content Decryption Module (CDM) in the Encrypted Media Extensions (EME) API in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 might allow remote attackers to execute arbitrary code by providing a malformed video and leveraging a Gecko Media Plugin (GMP) sandbox bypass.

Action-Not Available
Vendor-n/aMozilla CorporationOracle Corporation
Product-firefoxlinuxn/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2016-2821
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-7.5||HIGH
EPSS-2.76% / 85.43%
||
7 Day CHG~0.00%
Published-13 Jun, 2016 | 10:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Use-after-free vulnerability in the mozilla::dom::Element class in Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2, when contenteditable mode is enabled, allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by triggering deletion of DOM elements that were created in the editor.

Action-Not Available
Vendor-n/aMozilla CorporationopenSUSEDebian GNU/LinuxCanonical Ltd.
Product-leapfirefoxopensuseubuntu_linuxdebian_linuxn/a
CVE-2019-11757
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.78% / 81.96%
||
7 Day CHG~0.00%
Published-08 Jan, 2020 | 19:26
Updated-04 Aug, 2024 | 23:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-416
Use After Free
CVE-2014-1509
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.81% / 73.27%
||
7 Day CHG~0.00%
Published-19 Mar, 2014 | 10:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Buffer overflow in the _cairo_truetype_index_to_ucs4 function in cairo, as used in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25, allows remote attackers to execute arbitrary code via a crafted extension that renders fonts in a PDF document.

Action-Not Available
Vendor-n/aMozilla CorporationopenSUSESUSERed Hat, Inc.Canonical Ltd.
Product-enterprise_linux_serverenterprise_linux_eusfirefoxenterprise_linux_server_eusthunderbirdsuse_linux_enterprise_desktopenterprise_linux_server_ausseamonkeyfirefox_esrenterprise_linux_desktopubuntu_linuxopensusesuse_linux_enterprise_serverenterprise_linux_server_tusenterprise_linux_workstationsuse_linux_enterprise_software_development_kitn/a
CWE ID-CWE-120
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVE-2014-1526
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-0.70% / 71.06%
||
7 Day CHG~0.00%
Published-30 Apr, 2014 | 10:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The XrayWrapper implementation in Mozilla Firefox before 29.0 and SeaMonkey before 2.26 allows user-assisted remote attackers to bypass intended access restrictions via a crafted web site that is visited in the debugger, leading to unwrapping operations and calls to DOM methods on the unwrapped objects.

Action-Not Available
Vendor-n/aMozilla CorporationopenSUSEFedora ProjectCanonical Ltd.
Product-fedoraopensuseseamonkeyfirefoxubuntu_linuxn/a
CWE ID-CWE-269
Improper Privilege Management
CVE-2016-1970
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.75% / 72.17%
||
7 Day CHG~0.00%
Published-13 Mar, 2016 | 18:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Integer underflow in the srtp_unprotect function in the WebRTC implementation in Mozilla Firefox before 45.0 on Windows might allow remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors.

Action-Not Available
Vendor-n/aMozilla CorporationMicrosoft Corporation
Product-windowsfirefoxn/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2014-1497
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.50% / 65.00%
||
7 Day CHG~0.00%
Published-19 Mar, 2014 | 10:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The mozilla::WaveReader::DecodeAudioData function in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allows remote attackers to obtain sensitive information from process heap memory, cause a denial of service (out-of-bounds read and application crash), or possibly have unspecified other impact via a crafted WAV file.

Action-Not Available
Vendor-n/aMozilla CorporationopenSUSESUSERed Hat, Inc.Debian GNU/LinuxCanonical Ltd.
Product-enterprise_linux_serverenterprise_linux_eusfirefoxenterprise_linux_server_eusthunderbirdsuse_linux_enterprise_desktopdebian_linuxenterprise_linux_server_ausseamonkeyfirefox_esropensuseubuntu_linuxenterprise_linux_desktopsuse_linux_enterprise_serverenterprise_linux_server_tusenterprise_linux_workstationsuse_linux_enterprise_software_development_kitn/a
CWE ID-CWE-125
Out-of-bounds Read
CVE-2016-1960
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-87.70% / 99.43%
||
7 Day CHG~0.00%
Published-13 Mar, 2016 | 18:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Integer underflow in the nsHtml5TreeBuilder class in the HTML5 string parser in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) by leveraging mishandling of end tags, as demonstrated by incorrect SVG processing, aka ZDI-CAN-3545.

Action-Not Available
Vendor-n/aMozilla CorporationopenSUSESUSEOracle Corporation
Product-leapfirefoxopensusethunderbirdlinuxlinux_enterprisen/a
CVE-2014-1588
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-1.68% / 81.41%
||
7 Day CHG~0.00%
Published-11 Dec, 2014 | 11:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 34.0 and SeaMonkey before 2.31 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxseamonkeyn/a
CVE-2014-1593
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-2.11% / 83.40%
||
7 Day CHG~0.00%
Published-11 Dec, 2014 | 11:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Stack-based buffer overflow in the mozilla::FileBlockCache::Read function in Mozilla Firefox before 34.0, Firefox ESR 31.x before 31.3, Thunderbird before 31.3, and SeaMonkey before 2.31 allows remote attackers to execute arbitrary code via crafted media content.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxseamonkeyfirefox_esrthunderbirdn/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2014-1542
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-2.93% / 85.88%
||
7 Day CHG~0.00%
Published-11 Jun, 2014 | 10:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Buffer overflow in the Speex resampler in the Web Audio subsystem in Mozilla Firefox before 30.0 allows remote attackers to execute arbitrary code via vectors related to a crafted AudioBuffer channel count and sample rate.

Action-Not Available
Vendor-n/aMozilla CorporationOracle CorporationopenSUSE
Product-firefoxopensusesolarisn/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2013-6167
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-6.8||MEDIUM
EPSS-0.41% / 60.36%
||
7 Day CHG~0.00%
Published-15 Feb, 2014 | 11:00
Updated-11 Apr, 2025 | 00:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla Firefox through 27 sends HTTP Cookie headers without first validating that they have the required character-set restrictions, which allows remote attackers to conduct the equivalent of a persistent Logout CSRF attack via a crafted parameter that forces a web application to set a malformed cookie within an HTTP response.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxn/a
CWE ID-CWE-352
Cross-Site Request Forgery (CSRF)
CVE-2018-5127
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-18.40% / 94.98%
||
7 Day CHG~0.00%
Published-11 Jun, 2018 | 21:00
Updated-05 Aug, 2024 | 05:26
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

A buffer overflow can occur when manipulating the SVG "animatedPathSegList" through script. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.7, Firefox ESR < 52.7, and Firefox < 59.

Action-Not Available
Vendor-Canonical Ltd.Red Hat, Inc.Mozilla CorporationDebian GNU/Linux
Product-enterprise_linux_serverubuntu_linuxdebian_linuxthunderbirdenterprise_linux_server_eusfirefoxfirefox_esrenterprise_linux_server_ausenterprise_linux_workstationenterprise_linux_desktopThunderbirdFirefox ESRFirefox
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2014-1477
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-9.8||CRITICAL
EPSS-0.85% / 74.00%
||
7 Day CHG~0.00%
Published-06 Feb, 2014 | 02:00
Updated-11 Apr, 2025 | 00:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Action-Not Available
Vendor-n/aMozilla CorporationopenSUSESUSERed Hat, Inc.Fedora ProjectDebian GNU/LinuxCanonical Ltd.
Product-enterprise_linux_serverenterprise_linux_eusfirefoxenterprise_linux_server_eusthunderbirdsuse_linux_enterprise_desktopdebian_linuxenterprise_linux_server_ausfedoraseamonkeyfirefox_esrubuntu_linuxenterprise_linux_desktopopensusesuse_linux_enterprise_serverenterprise_linux_server_tusenterprise_linux_workstationsuse_linux_enterprise_software_development_kitn/a
CVE-2014-1592
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-1.77% / 81.89%
||
7 Day CHG~0.00%
Published-11 Dec, 2014 | 11:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Use-after-free vulnerability in the nsHtml5TreeOperation function in xul.dll in Mozilla Firefox before 34.0, Firefox ESR 31.x before 31.3, Thunderbird before 31.3, and SeaMonkey before 2.31 allows remote attackers to execute arbitrary code by adding a second root element to an HTML5 document during parsing.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxseamonkeyfirefox_esrthunderbirdn/a
CVE-2014-1502
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-0.28% / 51.31%
||
7 Day CHG~0.00%
Published-19 Mar, 2014 | 10:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The (1) WebGL.compressedTexImage2D and (2) WebGL.compressedTexSubImage2D functions in Mozilla Firefox before 28.0 and SeaMonkey before 2.25 allow remote attackers to bypass the Same Origin Policy and render content in a different domain via unspecified vectors.

Action-Not Available
Vendor-n/aMozilla CorporationopenSUSESUSEOracle Corporation
Product-solarisfirefoxopensuseseamonkeylinux_enterprise_desktoplinux_enterprise_serverlinux_enterprise_software_development_kitn/a
CWE ID-CWE-346
Origin Validation Error
CVE-2014-1589
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-0.30% / 53.20%
||
7 Day CHG~0.00%
Published-11 Dec, 2014 | 11:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla Firefox before 34.0 and SeaMonkey before 2.31 provide stylesheets with an incorrect primary namespace, which allows remote attackers to bypass intended access restrictions via an XBL binding.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxseamonkeyn/a
CWE ID-CWE-284
Improper Access Control
CVE-2014-1594
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-1.69% / 81.49%
||
7 Day CHG~0.00%
Published-11 Dec, 2014 | 11:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla Firefox before 34.0, Firefox ESR 31.x before 31.3, Thunderbird before 31.3, and SeaMonkey before 2.31 might allow remote attackers to execute arbitrary code by leveraging an incorrect cast from the BasicThebesLayer data type to the BasicContainerLayer data type.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxseamonkeyfirefox_esrthunderbirdn/a
CWE ID-CWE-20
Improper Input Validation
CVE-2014-1587
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-1.64% / 81.22%
||
7 Day CHG~0.00%
Published-11 Dec, 2014 | 11:00
Updated-12 Apr, 2025 | 10:46
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 34.0, Firefox ESR 31.x before 31.3, Thunderbird before 31.3, and SeaMonkey before 2.31 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxseamonkeyfirefox_esrthunderbirdn/a
CWE ID-CWE-20
Improper Input Validation
CVE-2013-5596
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-1.77% / 81.92%
||
7 Day CHG~0.00%
Published-30 Oct, 2013 | 10:00
Updated-11 Apr, 2025 | 00:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The cycle collection (CC) implementation in Mozilla Firefox before 25.0, Firefox ESR 24.x before 24.1, Thunderbird before 24.1, and SeaMonkey before 2.22 does not properly determine the thread for release of an image object, which allows remote attackers to execute arbitrary code or cause a denial of service (race condition and application crash) via a large HTML document containing IMG elements, as demonstrated by the Never-Ending Reddit on reddit.com.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-thunderbird_esrfirefoxseamonkeyfirefox_esrthunderbirdn/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2013-4227
Matching Score-8
Assigner-Red Hat, Inc.
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Matching Score-8
Assigner-Red Hat, Inc.
CVSS Score-8.8||HIGH
EPSS-0.20% / 42.72%
||
7 Day CHG+0.06%
Published-18 Feb, 2020 | 14:08
Updated-06 Aug, 2024 | 16:38
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Cross-site request forgery (CSRF) vulnerability in the persona_xsrf_token function in persona.module in the Mozilla Persona module 7.x-1.x before 7.x-1.11 for Drupal allows remote attackers to hijack the authentication of aribitrary users via a security token that is not a string data type.

Action-Not Available
Vendor-Mozilla Corporation
Product-personaPersona
CWE ID-CWE-352
Cross-Site Request Forgery (CSRF)
CVE-2020-15669
Matching Score-8
Assigner-Mozilla Corporation
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Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.45% / 62.78%
||
7 Day CHG~0.00%
Published-01 Oct, 2020 | 18:42
Updated-04 Aug, 2024 | 13:22
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefox_esrthunderbirdThunderbirdFirefox ESR
CWE ID-CWE-416
Use After Free
CVE-2013-1720
Matching Score-8
Assigner-Mozilla Corporation
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Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-1.94% / 82.67%
||
7 Day CHG~0.00%
Published-18 Sep, 2013 | 10:00
Updated-11 Apr, 2025 | 00:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The nsHtml5TreeBuilder::resetTheInsertionMode function in the HTML5 Tree Builder in Mozilla Firefox before 24.0, Thunderbird before 24.0, and SeaMonkey before 2.21 does not properly maintain the state of the insertion-mode stack for template elements, which allows remote attackers to execute arbitrary code or cause a denial of service (heap-based buffer over-read) by triggering use of this stack in its empty state.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxseamonkeythunderbirdn/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2013-1733
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-0.12% / 31.25%
||
7 Day CHG~0.00%
Published-24 Oct, 2013 | 10:00
Updated-11 Apr, 2025 | 00:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Cross-site request forgery (CSRF) vulnerability in process_bug.cgi in Bugzilla 4.4.x before 4.4.1 allows remote attackers to hijack the authentication of arbitrary users for requests that modify bugs via vectors involving a midair-collision token.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-bugzillan/a
CWE ID-CWE-352
Cross-Site Request Forgery (CSRF)
CVE-2013-1725
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-6.8||MEDIUM
EPSS-2.86% / 85.72%
||
7 Day CHG~0.00%
Published-18 Sep, 2013 | 10:00
Updated-11 Apr, 2025 | 00:51
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla Firefox before 24.0, Firefox ESR 17.x before 17.0.9, Thunderbird before 24.0, Thunderbird ESR 17.x before 17.0.9, and SeaMonkey before 2.21 do not ensure that initialization occurs for JavaScript objects with compartments, which allows remote attackers to execute arbitrary code by leveraging incorrect scope handling.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-thunderbird_esrfirefoxseamonkeythunderbirdn/a
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
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