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CVE-2021-23980

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Date: February 16, 2023

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.

Language: Python

Severity Score

Related Resources (9)

https://github.com/mozilla/bleach/commit/1334134d34397966a7f7cfebd38639e9ba2c680e
https://bugzilla.redhat.com/show_bug.cgi?id=1925252
https://security-tracker.debian.org/tracker/CVE-2021-23980
https://github.com/mozilla/bleach/security/advisories/GHSA-vv2x-vrpj-qqpq
https://security.alpinelinux.org/vuln/CVE-2021-23980
https://nvd.nist.gov/vuln/detail/CVE-2021-23980
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-23980
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-23980
https://www.mend.io/vulnerability-database/CVE-2021-23980

Severity Score

Weakness Type (CWE)

Cross-Site Scripting (XSS)

CWE-79

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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