Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3. Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15676 Reference (s):
- DEBIAN:DSA-4770
- URL: https://www.debian.org/security/2020/dsa-4770
- GENTOO:GLSA-202010-02
- URL: https://security.gentoo.org/glsa/202010-02
- https://bugzilla.mozilla.org/show_bug.cgi?id=1646140