CVE-2018-12369

critical

Published — · Modified —

CVSS v3

—

CVSS v2

—

VIR risk

9.5

Description

WebExtensions bundled with embedded experiments were not correctly checked for proper authorization. This allowed a malicious WebExtension to gain full browser permissions. This vulnerability affects Firefox ESR < 60.1 and Firefox < 61.

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-2018-12369

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2018-12369.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-201806-14

OS impact

OS	Version	Status	Fixed in
arch		fixed	`61.0-1`
sles		affected
debian	sid	fixed	`61.0-1`

References

https://security.archlinux.org/ASA-201806-14
https://www.suse.com/security/cve/CVE-2018-12369.html
https://security-tracker.debian.org/tracker/CVE-2018-12369

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