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Vulnerability Details :

CVE-2021-29970

Summary
Assigner-mozilla
Assigner Org ID-f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At-05 Aug, 2021 | 19:46
Updated At-03 Aug, 2024 | 22:24
Rejected At-
Credits

A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

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)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:mozilla
Assigner Org ID:f16b083a-5664-49f3-a51e-8d479e5ed7fe
Published At:05 Aug, 2021 | 19:46
Updated At:03 Aug, 2024 | 22:24
Rejected At:
▼CVE Numbering Authority (CNA)

A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

Affected Products
Vendor
Mozilla CorporationMozilla
Product
Thunderbird
Versions
Affected
  • From unspecified before 78.12 (custom)
Vendor
Mozilla CorporationMozilla
Product
Firefox ESR
Versions
Affected
  • From unspecified before 78.12 (custom)
Vendor
Mozilla CorporationMozilla
Product
Firefox
Versions
Affected
  • From unspecified before 90 (custom)
Problem Types
TypeCWE IDDescription
textN/AUse-after-free in accessibility features of a document
Type: text
CWE ID: N/A
Description: Use-after-free in accessibility features of a document
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/mfsa2021-28/
x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2021-30/
x_refsource_MISC
https://www.mozilla.org/security/advisories/mfsa2021-29/
x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1709976
x_refsource_MISC
https://security.gentoo.org/glsa/202202-03
vendor-advisory
x_refsource_GENTOO
https://security.gentoo.org/glsa/202208-14
vendor-advisory
x_refsource_GENTOO
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-28/
Resource:
x_refsource_MISC
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-30/
Resource:
x_refsource_MISC
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-29/
Resource:
x_refsource_MISC
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1709976
Resource:
x_refsource_MISC
Hyperlink: https://security.gentoo.org/glsa/202202-03
Resource:
vendor-advisory
x_refsource_GENTOO
Hyperlink: https://security.gentoo.org/glsa/202208-14
Resource:
vendor-advisory
x_refsource_GENTOO
▼Authorized Data Publishers (ADP)
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/mfsa2021-28/
x_refsource_MISC
x_transferred
https://www.mozilla.org/security/advisories/mfsa2021-30/
x_refsource_MISC
x_transferred
https://www.mozilla.org/security/advisories/mfsa2021-29/
x_refsource_MISC
x_transferred
https://bugzilla.mozilla.org/show_bug.cgi?id=1709976
x_refsource_MISC
x_transferred
https://security.gentoo.org/glsa/202202-03
vendor-advisory
x_refsource_GENTOO
x_transferred
https://security.gentoo.org/glsa/202208-14
vendor-advisory
x_refsource_GENTOO
x_transferred
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-28/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-30/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-29/
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1709976
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://security.gentoo.org/glsa/202202-03
Resource:
vendor-advisory
x_refsource_GENTOO
x_transferred
Hyperlink: https://security.gentoo.org/glsa/202208-14
Resource:
vendor-advisory
x_refsource_GENTOO
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@mozilla.org
Published At:05 Aug, 2021 | 20:15
Updated At:09 Dec, 2022 | 19:04

A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.8HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary2.05.1MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:P
Type: Primary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Type: Primary
Version: 2.0
Base score: 5.1
Base severity: MEDIUM
Vector:
AV:N/AC:H/Au:N/C:P/I:P/A:P
CPE Matches

Mozilla Corporation
mozilla
>>firefox>>Versions before 90.0(exclusive)
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Mozilla Corporation
mozilla
>>firefox_esr>>Versions before 78.12(exclusive)
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Mozilla Corporation
mozilla
>>thunderbird>>Versions before 78.12(exclusive)
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-416Primarynvd@nist.gov
CWE-787Primarynvd@nist.gov
CWE ID: CWE-416
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-787
Type: Primary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://bugzilla.mozilla.org/show_bug.cgi?id=1709976security@mozilla.org
Exploit
Issue Tracking
Vendor Advisory
https://security.gentoo.org/glsa/202202-03security@mozilla.org
Third Party Advisory
https://security.gentoo.org/glsa/202208-14security@mozilla.org
Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2021-28/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-29/security@mozilla.org
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2021-30/security@mozilla.org
Vendor Advisory
Hyperlink: https://bugzilla.mozilla.org/show_bug.cgi?id=1709976
Source: security@mozilla.org
Resource:
Exploit
Issue Tracking
Vendor Advisory
Hyperlink: https://security.gentoo.org/glsa/202202-03
Source: security@mozilla.org
Resource:
Third Party Advisory
Hyperlink: https://security.gentoo.org/glsa/202208-14
Source: security@mozilla.org
Resource:
Third Party Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-28/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-29/
Source: security@mozilla.org
Resource:
Vendor Advisory
Hyperlink: https://www.mozilla.org/security/advisories/mfsa2021-30/
Source: security@mozilla.org
Resource:
Vendor Advisory

Change History

0
Information is not available yet

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Incorrect bookkeeping of functions inlined during JIT compilation could have led to memory corruption and a potentially exploitable crash when handling out-of-memory errors. This vulnerability affects Firefox < 83.

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Known To Be Used In Ransomware Campaigns?-Not Available
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In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.

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CWE ID-CWE-416
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CVSS Score-8.8||HIGH
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||
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Updated-04 Aug, 2024 | 16:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable. This vulnerability affects Thunderbird < 78.5.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdThunderbird
CWE ID-CWE-787
Out-of-bounds Write
CVE-2020-26974
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.46% / 70.73%
||
7 Day CHG~0.00%
Published-07 Jan, 2021 | 13:52
Updated-04 Aug, 2024 | 16:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-787
Out-of-bounds Write
CVE-2020-26959
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.27% / 66.80%
||
7 Day CHG~0.00%
Published-09 Dec, 2020 | 00:22
Updated-04 Aug, 2024 | 16:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

During browser shutdown, reference decrementing could have occured on a previously freed object, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-416
Use After Free
CVE-2020-26960
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.54% / 72.39%
||
7 Day CHG~0.00%
Published-09 Dec, 2020 | 00:23
Updated-04 Aug, 2024 | 16:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

If the Compact() method was called on an nsTArray, the array could have been reallocated without updating other pointers, leading to a potential use-after-free and exploitable crash. This vulnerability affects Firefox < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-416
Use After Free
CVE-2020-15670
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.08% / 61.56%
||
7 Day CHG~0.00%
Published-01 Oct, 2020 | 18:41
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

Mozilla developers reported memory safety bugs present in Firefox for Android 79. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 80, Firefox ESR < 78.2, Thunderbird < 78.2, and Firefox for Android < 80.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbirdFirefox for Android
CWE ID-CWE-416
Use After Free
CWE ID-CWE-617
Reachable Assertion
CWE ID-CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE-2020-15678
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.88% / 77.30%
||
7 Day CHG~0.00%
Published-01 Oct, 2020 | 18:29
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 recursing through graphical layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free. This occurs because the function APZCTreeManager::ComputeClippedCompositionBounds did not follow iterator invalidation rules. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

Action-Not Available
Vendor-Debian GNU/LinuxopenSUSEMozilla Corporation
Product-thunderbirddebian_linuxfirefoxfirefox_esrleapFirefoxFirefox ESRThunderbird
CWE ID-CWE-416
Use After Free
CVE-2020-15674
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.81% / 53.17%
||
7 Day CHG~0.00%
Published-01 Oct, 2020 | 18:37
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

Mozilla developers reported memory safety bugs present in Firefox 80. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-787
Out-of-bounds Write
CWE ID-CWE-667
Improper Locking
CVE-2020-15669
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.12% / 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-2020-15675
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.02% / 59.75%
||
7 Day CHG~0.00%
Published-01 Oct, 2020 | 18:32
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 processing surfaces, the lifetime may outlive a persistent buffer leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 81.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-416
Use After Free
CVE-2020-26969
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.20% / 64.86%
||
7 Day CHG~0.00%
Published-09 Dec, 2020 | 00:26
Updated-04 Aug, 2024 | 16:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers reported memory safety bugs present in Firefox 82. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 83.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2020-26971
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.88% / 77.22%
||
7 Day CHG~0.00%
Published-07 Jan, 2021 | 13:54
Updated-04 Aug, 2024 | 16:03
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Certain blit values provided by the user were not properly constrained leading to a heap buffer overflow on some video drivers. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrFirefoxFirefox ESRThunderbird
CWE ID-CWE-787
Out-of-bounds Write
CVE-2014-1513
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-5.58% / 92.05%
||
7 Day CHG~0.00%
Published-19 Mar, 2014 | 10:00
Updated-06 May, 2026 | 22:30
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

TypedArrayObject.cpp in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 does not prevent a zero-length transition during use of an ArrayBuffer object, which allows remote attackers to execute arbitrary code or cause a denial of service (heap-based out-of-bounds write or read) via a crafted web site.

Action-Not Available
Vendor-n/aCanonical Ltd.openSUSESUSERed Hat, Inc.Mozilla CorporationDebian GNU/Linux
Product-thunderbirdsuse_linux_enterprise_software_development_kitdebian_linuxubuntu_linuxseamonkeyenterprise_linux_server_tusenterprise_linux_desktopenterprise_linux_server_eusenterprise_linux_server_ausfirefoxenterprise_linux_serverenterprise_linux_workstationsuse_linux_enterprise_serverenterprise_linux_eussuse_linux_enterprise_desktopopensusen/a
CWE ID-CWE-787
Out-of-bounds Write
CVE-2014-1531
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-5.59% / 92.07%
||
7 Day CHG~0.00%
Published-30 Apr, 2014 | 10:00
Updated-06 May, 2026 | 22:30
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 nsGenericHTMLElement::GetWidthHeightForImage function in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via vectors involving an imgLoader object that is not properly handled during an image-resize operation.

Action-Not Available
Vendor-n/aCanonical Ltd.openSUSESUSERed Hat, Inc.Mozilla CorporationDebian GNU/LinuxFedora Project
Product-thunderbirddebian_linuxfirefoxubuntu_linuxseamonkeyenterprise_linux_serverenterprise_linux_workstationsuse_linux_enterprise_serverenterprise_linux_server_tusenterprise_linux_desktopenterprise_linux_server_eusfedoraenterprise_linux_server_ausenterprise_linux_eusopensusen/a
CWE ID-CWE-416
Use After Free
CVE-2022-0566
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.70% / 49.43%
||
7 Day CHG~0.00%
Published-22 Dec, 2022 | 00:00
Updated-16 Apr, 2025 | 16:15
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

It may be possible for an attacker to craft an email message that causes Thunderbird to perform an out-of-bounds write of one byte when processing the message. This vulnerability affects Thunderbird < 91.6.1.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdThunderbird
CWE ID-CWE-787
Out-of-bounds Write
CVE-2014-1482
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-6.30% / 92.87%
||
7 Day CHG~0.00%
Published-06 Feb, 2014 | 02:00
Updated-29 Apr, 2026 | 01:13
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

RasterImage.cpp in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, and SeaMonkey before 2.24 does not prevent access to discarded data, which allows remote attackers to execute arbitrary code or cause a denial of service (incorrect write operations) via crafted image data, as demonstrated by Goo Create.

Action-Not Available
Vendor-n/aCanonical Ltd.openSUSESUSERed Hat, Inc.Mozilla CorporationDebian GNU/LinuxFedora Project
Product-thunderbirdsuse_linux_enterprise_software_development_kitdebian_linuxubuntu_linuxseamonkeyenterprise_linux_server_tusenterprise_linux_desktopenterprise_linux_server_eusenterprise_linux_server_ausfedorafirefoxenterprise_linux_serverenterprise_linux_workstationsuse_linux_enterprise_serverenterprise_linux_eussuse_linux_enterprise_desktopopensusen/a
CWE ID-CWE-787
Out-of-bounds Write
CVE-2020-6805
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.25% / 66.31%
||
7 Day CHG~0.00%
Published-25 Mar, 2020 | 21:14
Updated-04 Aug, 2024 | 09:11
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When removing data about an origin whose tab was recently closed, a use-after-free could occur in the Quota manager, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxthunderbirdfirefox_esrThunderbirdFirefox ESRFirefox
CWE ID-CWE-416
Use After Free
CVE-2020-15673
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.96% / 78.24%
||
7 Day CHG~0.00%
Published-01 Oct, 2020 | 18:39
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

Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

Action-Not Available
Vendor-Debian GNU/LinuxopenSUSEMozilla Corporation
Product-thunderbirddebian_linuxfirefoxfirefox_esrleapFirefoxFirefox ESRThunderbird
CWE ID-CWE-416
Use After Free
CVE-2021-23979
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.92% / 56.77%
||
7 Day CHG~0.00%
Published-26 Feb, 2021 | 15:28
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

Mozilla developers reported memory safety bugs present in Firefox 85. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 86.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2021-38496
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.59% / 73.15%
||
7 Day CHG~0.00%
Published-03 Nov, 2021 | 00:03
Updated-21 Oct, 2024 | 13:55
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.15, Thunderbird < 91.2, Firefox ESR < 91.2, Firefox ESR < 78.15, and Firefox < 93.

Action-Not Available
Vendor-Debian GNU/LinuxMozilla Corporation
Product-firefoxthunderbirddebian_linuxfirefox_esrThunderbirdFirefox ESRFirefox
CWE ID-CWE-416
Use After Free
CVE-2021-29967
Matching Score-10
Assigner-Mozilla Corporation
ShareView Details
Matching Score-10
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.37% / 69.00%
||
7 Day CHG~0.00%
Published-24 Jun, 2021 | 13:14
Updated-03 Aug, 2024 | 22:24
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdfirefox_esrThunderbirdFirefox ESRFirefox
CWE ID-CWE-787
Out-of-bounds Write
CVE-2026-8957
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.39% / 31.20%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:29
Updated-20 May, 2026 | 17:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Enterprise Policies component

Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
CVE-2020-12406
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.02% / 59.82%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:45
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Mozilla Developer Iain Ireland discovered a missing type check during unboxed objects removal, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.

Action-Not Available
Vendor-Mozilla CorporationCanonical Ltd.
Product-firefoxubuntu_linuxthunderbirdfirefox_esrThunderbirdFirefox ESRFirefox
CWE ID-CWE-345
Insufficient Verification of Data Authenticity
CVE-2020-12409
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-1.02% / 59.82%
||
7 Day CHG~0.00%
Published-09 Jul, 2020 | 14:46
Updated-04 Aug, 2024 | 11:56
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

When using certain blank characters in a URL, they where incorrectly rendered as spaces instead of an encoded URL. This vulnerability affects Firefox < 77.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxFirefox
CVE-2026-8955
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.39% / 31.20%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:29
Updated-20 May, 2026 | 17:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the DOM: Workers component

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-firefoxthunderbirdFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
CVE-2005-2262
Matching Score-8
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-8
Assigner-Red Hat, Inc.
CVSS Score-5.1||MEDIUM
EPSS-6.55% / 93.08%
||
7 Day CHG~0.00%
Published-13 Jul, 2005 | 04:00
Updated-16 Apr, 2026 | 00:27
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Firefox 1.0.3 and 1.0.4, and Netscape 8.0.2, allows remote attackers to execute arbitrary code by tricking the user into using the "Set As Wallpaper" (in Firefox) or "Set as Background" (in Netscape) context menu on an image URL that is really a javascript: URL with an eval statement, aka "Firewalling."

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxn/a
CVE-2005-1477
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-5.1||MEDIUM
EPSS-15.24% / 96.41%
||
7 Day CHG~0.00%
Published-09 May, 2005 | 04:00
Updated-16 Apr, 2026 | 00:27
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The install function in Firefox 1.0.3 allows remote web sites on the browser's whitelist, such as update.mozilla.org or addon.mozilla.org, to execute arbitrary Javascript with chrome privileges, leading to arbitrary code execution on the system when combined with vulnerabilities such as CVE-2005-1476, as demonstrated using a javascript: URL as the package icon and a cross-site scripting (XSS) attack on a vulnerable whitelist site.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxn/a
CVE-2005-1160
Matching Score-8
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-8
Assigner-Red Hat, Inc.
CVSS Score-5.1||MEDIUM
EPSS-2.72% / 84.48%
||
7 Day CHG~0.00%
Published-18 Apr, 2005 | 04:00
Updated-16 Apr, 2026 | 00:27
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

The privileged "chrome" UI code in Firefox before 1.0.3 and Mozilla Suite before 1.7.7 allows remote attackers to gain privileges by overriding certain properties or methods of DOM nodes, as demonstrated using multiple attacks involving the eval function or the Script object.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxmozillan/a
CVE-2005-1476
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-5.1||MEDIUM
EPSS-16.70% / 96.69%
||
7 Day CHG~0.00%
Published-09 May, 2005 | 04:00
Updated-16 Apr, 2026 | 00:27
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

Firefox 1.0.3 allows remote attackers to execute arbitrary Javascript in other domains by using an IFRAME and causing the browser to navigate to a previous javascript: URL, which can lead to arbitrary code execution when combined with CVE-2005-1477.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxn/a
CVE-2026-8974
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.33% / 25.70%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:30
Updated-23 Jul, 2026 | 20:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151

Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2005-0399
Matching Score-8
Assigner-Red Hat, Inc.
ShareView Details
Matching Score-8
Assigner-Red Hat, Inc.
CVSS Score-5.1||MEDIUM
EPSS-15.12% / 96.38%
||
7 Day CHG~0.00%
Published-24 Mar, 2005 | 05:00
Updated-16 Apr, 2026 | 00:27
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 GIF2.cpp in Firefox before 1.0.2, Mozilla before to 1.7.6, and Thunderbird before 1.0.2, and possibly other applications that use the same library, allows remote attackers to execute arbitrary code via a GIF image with a crafted Netscape extension 2 block and buffer size.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-firefoxthunderbirdmozillan/a
CVE-2026-8970
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.31% / 22.99%
||
7 Day CHG~0.00%
Published-19 May, 2026 | 12:30
Updated-23 Jul, 2026 | 20:10
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Security component

Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
CVE-2004-0909
Matching Score-8
Assigner-MITRE Corporation
ShareView Details
Matching Score-8
Assigner-MITRE Corporation
CVSS Score-5.1||MEDIUM
EPSS-1.71% / 74.96%
||
7 Day CHG~0.00%
Published-24 Sep, 2004 | 04:00
Updated-16 Apr, 2026 | 00:27
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 the Preview Release, Mozilla before 1.7.3, and Thunderbird before 0.8 may allow remote attackers to trick users into performing unexpected actions, including installing software, via signed scripts that request enhanced abilities using the enablePrivilege parameter, then modify the meaning of certain security-relevant dialog messages.

Action-Not Available
Vendor-n/aMozilla Corporation
Product-thunderbirdmozillan/a
CVE-2014-1518
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-5.98% / 92.53%
||
7 Day CHG~0.00%
Published-30 Apr, 2014 | 10:00
Updated-06 May, 2026 | 22:30
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 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 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/aCanonical Ltd.openSUSESUSERed Hat, Inc.Mozilla CorporationDebian GNU/LinuxFedora Project
Product-thunderbirdenterprise_linux_eusfirefoxubuntu_linuxseamonkeydebian_linuxenterprise_linux_serverenterprise_linux_workstationsuse_linux_enterprise_serverenterprise_linux_server_tusenterprise_linux_desktopenterprise_linux_server_eusenterprise_linux_server_ausfedoraopensusen/a
CVE-2026-6750
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.48% / 38.87%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:40
Updated-15 Jul, 2026 | 01:16
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Graphics: WebRender component

Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Action-Not Available
Vendor-Red Hat, Inc.Mozilla Corporation
Product-thunderbirdfirefoxThunderbirdFirefoxRed Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRed Hat Enterprise Linux 7Red Hat Enterprise Linux 6Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRed Hat Enterprise Linux 9.4 Extended Update SupportRed Hat Enterprise Linux 10Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat Enterprise Linux 9Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat Enterprise Linux 9.6 Extended Update SupportRed Hat Enterprise Linux 8Red Hat Enterprise Linux 7 Extended Lifecycle SupportRed Hat Enterprise Linux 8.6 Telecommunications Update ServiceRed Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat Enterprise Linux 10.0 Extended Update Support
CWE ID-CWE-266
Incorrect Privilege Assignment
CWE ID-CWE-269
Improper Privilege Management
CVE-2026-6769
Matching Score-8
Assigner-Mozilla Corporation
ShareView Details
Matching Score-8
Assigner-Mozilla Corporation
CVSS Score-8.8||HIGH
EPSS-0.23% / 13.45%
||
7 Day CHG~0.00%
Published-21 Apr, 2026 | 12:41
Updated-26 May, 2026 | 17:52
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available
Privilege escalation in the Debugger component

Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Action-Not Available
Vendor-Mozilla Corporation
Product-thunderbirdfirefoxFirefoxThunderbird
CWE ID-CWE-269
Improper Privilege Management
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