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CVE-2021-23980

Status Candidate

Overview

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.

Related Files

Debian Security Advisory 4892-1
Posted Apr 28, 2021
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4892-1 - It was reported that python-bleach, a whitelist-based HTML-sanitizing library, is prone to a mutation XSS vulnerability in bleach.clean when 'svg' or 'math' are in the allowed tags, 'p' or 'br' are in allowed tags, 'style', 'title', 'noscript', 'script', 'textarea', 'noframes', 'iframe', or 'xmp' are in allowed tags and 'strip_comments=False' is set.

tags | advisory, python
systems | linux, debian
advisories | CVE-2021-23980
SHA-256 | e925541c26637d55f5311218ab1047e942a1ea57bb81e223c144e1e77c463d88
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