AI Score
Confidence
High
EPSS
Percentile
66.0%
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.
bugzilla.mozilla.org/show_bug.cgi?id=1680084
www.mozilla.org/security/advisories/mfsa2020-54/
www.mozilla.org/security/advisories/mfsa2020-55/
www.mozilla.org/security/advisories/mfsa2020-56/