CSS Sanitizer Bypass Vulnerability in Firefox, Thunderbird, and Firefox ESR

CSS Sanitizer Bypass Vulnerability in Firefox, Thunderbird, and Firefox ESR

CVE-2020-26973 · HIGH Severity

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.

Learn more about our Web Application Penetration Testing UK.