CVE-2021-23980

PoC —

CVSS 3.1

6.1 medium

EPSS

<1%p40

Published

Feb 16, 2023 (Feb 16, 2023)

Modified

Jun 17, 2026

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.

Vendors: mozilla
Products: bleach
Weakness: CWE-79
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

NVD CVE.org GitHub PoCs EPSS (0.5%)

In the news0 stories

No ingested article mentions this CVE yet.