CVE-2021-23974

Medium

Description

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.

SeverityMedium

CVSS6.1

Exploit probability—

Product

Mozilla Firefox

PublishedFeb 26, 2021

First seenFeb 26, 2021

How to fix

Update

mozilla firefox86.0 or later

Vendor advisories

security.gentoo.org/glsa/202104-10

Affected products

Product	Affected versions	Fixed in
mozilla firefox	v < 86.0	86.0

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