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Vulnerability Details :

CVE-2020-26239

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-23 Nov, 2020 | 19:05
Updated At-04 Aug, 2024 | 15:56
Rejected At-
Credits

Cross-Site Scripting in Scratch browser addons

Scratch Addons is a WebExtension that supports both Chrome and Firefox. Scratch Addons before version 1.3.2 is vulnerable to DOM-based XSS. If the victim visited a specific website, the More Links addon of the Scratch Addons extension used incorrect regular expression which caused the HTML-escaped values to be unescaped, leading to XSS. Scratch Addons version 1.3.2 fixes the bug. The extension will be automatically updated by the browser. More Links addon can be disabled via the option of the extension.

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:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:23 Nov, 2020 | 19:05
Updated At:04 Aug, 2024 | 15:56
Rejected At:
▼CVE Numbering Authority (CNA)
Cross-Site Scripting in Scratch browser addons

Scratch Addons is a WebExtension that supports both Chrome and Firefox. Scratch Addons before version 1.3.2 is vulnerable to DOM-based XSS. If the victim visited a specific website, the More Links addon of the Scratch Addons extension used incorrect regular expression which caused the HTML-escaped values to be unescaped, leading to XSS. Scratch Addons version 1.3.2 fixes the bug. The extension will be automatically updated by the browser. More Links addon can be disabled via the option of the extension.

Affected Products
Vendor
ScratchAddons
Product
ScratchAddons
Versions
Affected
  • < 1.3.2
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-79
Description: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
3.17.6HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N
Version: 3.1
Base score: 7.6
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/ScratchAddons/ScratchAddons/security/advisories/GHSA-6qfq-px3r-xj4p
x_refsource_CONFIRM
https://github.com/ScratchAddons/ScratchAddons/commit/b9a52d6532c8514254c7cc1d8e18710dbedc41ff
x_refsource_MISC
https://github.com/ScratchAddons/ScratchAddons/blob/a471893df403f86c9182970678175d4772a0690c/addons/more-links/userscript.js#L15
x_refsource_MISC
https://github.com/ScratchAddons/ScratchAddons/releases/tag/v1.3.2
x_refsource_MISC
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/security/advisories/GHSA-6qfq-px3r-xj4p
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/commit/b9a52d6532c8514254c7cc1d8e18710dbedc41ff
Resource:
x_refsource_MISC
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/blob/a471893df403f86c9182970678175d4772a0690c/addons/more-links/userscript.js#L15
Resource:
x_refsource_MISC
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/releases/tag/v1.3.2
Resource:
x_refsource_MISC
▼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://github.com/ScratchAddons/ScratchAddons/security/advisories/GHSA-6qfq-px3r-xj4p
x_refsource_CONFIRM
x_transferred
https://github.com/ScratchAddons/ScratchAddons/commit/b9a52d6532c8514254c7cc1d8e18710dbedc41ff
x_refsource_MISC
x_transferred
https://github.com/ScratchAddons/ScratchAddons/blob/a471893df403f86c9182970678175d4772a0690c/addons/more-links/userscript.js#L15
x_refsource_MISC
x_transferred
https://github.com/ScratchAddons/ScratchAddons/releases/tag/v1.3.2
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/security/advisories/GHSA-6qfq-px3r-xj4p
Resource:
x_refsource_CONFIRM
x_transferred
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/commit/b9a52d6532c8514254c7cc1d8e18710dbedc41ff
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/blob/a471893df403f86c9182970678175d4772a0690c/addons/more-links/userscript.js#L15
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/releases/tag/v1.3.2
Resource:
x_refsource_MISC
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:23 Nov, 2020 | 19:15
Updated At:03 Dec, 2020 | 13:43

Scratch Addons is a WebExtension that supports both Chrome and Firefox. Scratch Addons before version 1.3.2 is vulnerable to DOM-based XSS. If the victim visited a specific website, the More Links addon of the Scratch Addons extension used incorrect regular expression which caused the HTML-escaped values to be unescaped, leading to XSS. Scratch Addons version 1.3.2 fixes the bug. The extension will be automatically updated by the browser. More Links addon can be disabled via the option of the extension.

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
Primary3.15.4MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Secondary3.17.6HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N
Primary2.03.5LOW
AV:N/AC:M/Au:S/C:N/I:P/A:N
Type: Primary
Version: 3.1
Base score: 5.4
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 7.6
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N
Type: Primary
Version: 2.0
Base score: 3.5
Base severity: LOW
Vector:
AV:N/AC:M/Au:S/C:N/I:P/A:N
CPE Matches
scratchaddons
scratchaddons
>>scratch_addons>>Versions before 1.3.2(exclusive)
cpe:2.3:a:scratchaddons:scratch_addons:*:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-79Primarysecurity-advisories@github.com
CWE ID: CWE-79
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/ScratchAddons/ScratchAddons/blob/a471893df403f86c9182970678175d4772a0690c/addons/more-links/userscript.js#L15security-advisories@github.com
Third Party Advisory
https://github.com/ScratchAddons/ScratchAddons/commit/b9a52d6532c8514254c7cc1d8e18710dbedc41ffsecurity-advisories@github.com
Patch
Third Party Advisory
https://github.com/ScratchAddons/ScratchAddons/releases/tag/v1.3.2security-advisories@github.com
Release Notes
Third Party Advisory
https://github.com/ScratchAddons/ScratchAddons/security/advisories/GHSA-6qfq-px3r-xj4psecurity-advisories@github.com
Patch
Third Party Advisory
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/blob/a471893df403f86c9182970678175d4772a0690c/addons/more-links/userscript.js#L15
Source: security-advisories@github.com
Resource:
Third Party Advisory
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/commit/b9a52d6532c8514254c7cc1d8e18710dbedc41ff
Source: security-advisories@github.com
Resource:
Patch
Third Party Advisory
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/releases/tag/v1.3.2
Source: security-advisories@github.com
Resource:
Release Notes
Third Party Advisory
Hyperlink: https://github.com/ScratchAddons/ScratchAddons/security/advisories/GHSA-6qfq-px3r-xj4p
Source: security-advisories@github.com
Resource:
Patch
Third Party Advisory

Change History

0
Information is not available yet

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