#VU50882 Cross-site scripting in Mozilla Firefox - CVE-2021-23974

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Main Vulnerability Database Vulnerabilities #VU50882

#VU50882 Cross-site scripting in Mozilla Firefox - CVE-2021-23974

Published: February 23, 2021


Vulnerability identifier: #VU50882
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2021-23974
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Mozilla Firefox
Software vendor:
Mozilla

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. The DOMParser API did not properly process <noscript> elements for escaping. A remote attacker can bypass HTML Sanitizer and perform XSS attacks.


Remediation

Install updates from vendor's website.

External links