Name: CVE-2021-23980: Improper Neutralization of Input During Web Page Generation
Creator: Rapid7
Published: 2023-02-16T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2021-23980, CWE-79, CVSS 6.1, EPSS 0.00409

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 Details

CVSS 3.1 Base Score: 6.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade py3-bleach	Aug 22, 2024	Feb 16, 2023
Debian	—	Upgrade python-bleach	Apr 8, 2021	Apr 8, 2021
Suse	—	Upgrade python3-bleachUpgrade python2-bleach	Apr 15, 2021	Apr 14, 2021
Ubuntu	—	Upgrade python-bleach (Ubuntu Pro)Upgrade python3-bleach (Ubuntu Pro)Upgrade python-bleach-doc (Ubuntu Pro)	Mar 9, 2026	Mar 5, 2026

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CVSS Details

Covered by Rapid7

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