Published: 26/02/2021 Updated: 23/05/2022

CVSS v2 Base Score: 4.3 | Impact Score: 2.9 | Exploitability Score: 8.6

CVSS v3 Base Score: 6.1 | Impact Score: 2.7 | Exploitability Score: 2.8

VMScore: 383

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

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.

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mozilla firefox

Mozilla Foundation Security Advisory 2021-07 Security Vulnerabilities fixed in Firefox 86 Announced February 23, 2021 Impact high Products Firefox Fixed in Firefox 86 ...

A security issue was found in Firefox before version 860 The DOMParser API did not properly process <noscript> elements for escaping This could be used as a mutation cross-site scripting (mXSS) vector to bypass an HTML Sanitizer ...

NVD-CWE-noinfo https://bugzilla.mozilla.org/buglist.cgi?bug_id=1528997%2C1683627 https://www.mozilla.org/security/advisories/mfsa2021-07/https://security.gentoo.org/glsa/202104-10 https://nvd.nist.gov https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/https://security.archlinux.org/CVE-2021-23974

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CVE-2021-23974

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