CVE-2021-23980

CVSS 6.1 MEDIUMEPSS 0.5%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.1EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

16 Feb 2023Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

Mozilla · Mozilla Bleach

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-23980 https://github.com/mozilla/bleach/security/advisories/GHSA-vv2x-vrpj-qqpq