CVE-2021-23974

CVE-2021-23974

EPSS 0.8%

The DOMParser API did not properly process '<noscript>' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86.

Affected products

Mozilla · Firefox

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References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1528997%2C1683627 https://security.gentoo.org/glsa/202104-10 https://www.mozilla.org/security/advisories/mfsa2021-07/