Cross-site Scripting (XSS) Affecting py3-bleach package, versions <3.3.0-r0


Severity

Recommended
0.0
medium
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.09% (39th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Cross-site Scripting (XSS) vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-ALPINE319-PY3BLEACH-6110990
  • published8 Dec 2023
  • disclosed16 Feb 2023

Introduced: 16 Feb 2023

CVE-2021-23980  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Alpine:3.19 py3-bleach to version 3.3.0-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream py3-bleach package and not the py3-bleach package as distributed by Alpine. See How to fix? for Alpine:3.19 relevant fixed versions and status.

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 Scores

version 3.1