Description

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.

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00074.html

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00077.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1646140

https://lists.debian.org/debian-lts-announce/2020/10/msg00020.html

https://security.gentoo.org/glsa/202010-02

https://www.debian.org/security/2020/dsa-4770

https://www.mozilla.org/security/advisories/mfsa2020-42/

https://www.mozilla.org/security/advisories/mfsa2020-43/

https://www.mozilla.org/security/advisories/mfsa2020-44/

Details

Risk Information

CVSS v2

CVSS v3