CVE-2020-15676

high
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
8.0

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.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-15676

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202009-10

OS impact

OSVersionStatusFixed in
arch archfixed81.0-1
debian debiansidfixed81.0-1
debian debianbookwormfixed78.3.0esr-1
debian debianbullseyefixed78.3.0esr-1
debian debianforkyfixed78.3.0esr-1
debian debiantrixiefixed78.3.0esr-1

References

Verify integrity in audit chain (admin only). AS-IS.