CVE-2021-23980

CVE Database · CVE-2021-23980

CVE-2021-23980

· MEDIUMModified

CVSS v3.1

6.1

EPSS

0.48%

Published

Feb 16, 2023

Modified

Mar 19, 2025

Public PoC / Exploit (1)

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Links to public security research (Exploit-DB, Nuclei, Trickest, GitHub) for defensive use only.

Description

A mutation XSS affects users calling bleach.clean with all of: svg or math in the allowed tags p or br in allowed tags style, title, noscript, script, textarea, noframes, iframe, or xmp in allowed tags the keyword argument strip_comments=False Note: none of the above tags are in the default allowed tags and strip_comments defaults to True.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

CWE-79CWE-79

Affected Products (1)

mozilla · bleach (up to 3.3.0)vulnerable

References (4)

https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-23980

ExploitIssue Tracking

https://github.com/mozilla/bleach/security/advisories/GHSA-vv2x-vrpj-qqpq

Vendor Advisory

https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-23980

ExploitIssue Tracking

https://github.com/mozilla/bleach/security/advisories/GHSA-vv2x-vrpj-qqpq

Vendor Advisory

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