CVE-2021-23980

Published: Feb 16, 2023Modified: Jun 17, 2026

6.1

Vector

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

Exploitability: 2.8 / Impact: 2.7

Source: NVD

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.

Affected (1)

Products: Mozilla: Bleach

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Mozilla Bleach	Before 3.3.0

Related CWEs

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (4)

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

Source: security@mozilla.org

ExploitIssue Tracking

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

Source: security@mozilla.org

Vendor Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue Tracking

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

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.