CVE-2021-23974

MediumCVSS 6.1/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected software

No affected versions have been published.

Timeline

Published: Feb 26, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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