CVE-2021-23980

Public Exploit

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.

Category

6.1
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.32%
Vendor Advisory github.com
Affected: Mozilla Mozilla Bleach
Published at:
Updated at:

References

Link Tags
https://github.com/mozilla/bleach/security/advisories/GHSA-vv2x-vrpj-qqpq vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2021-23980 issue tracking exploit

Frequently Asked Questions

What is the severity of CVE-2021-23980?
CVE-2021-23980 has been scored as a medium severity vulnerability.
How to fix CVE-2021-23980?
To fix CVE-2021-23980, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-23980 being actively exploited in the wild?
It is possible that CVE-2021-23980 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-23980?
CVE-2021-23980 affects Mozilla Mozilla Bleach.
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