CVE-2022-31743: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Firefox's HTML parser did not correctly interpret HTML comment tags, resulting in an incongruity with other browsers. This could have been used to escape HTML comments on pages that put user-controlled data in them. This vulnerability affects Firefox < 101.

Affected products

• Mozilla Firefox: before 101.0 (fixed in 101.0)

Published 2022-12-22. Last modified 2026-06-17.