Use-after-free in the Audio/Video component. This vulnerability affects Firefox < 145, Firefox ESR < 140.5, and Firefox ESR < 115.30.
https://www.mozilla.org/security/advisories/mfsa2025-89/
https://www.mozilla.org/security/advisories/mfsa2025-88/
https://www.mozilla.org/security/advisories/mfsa2025-87/
https://bugzilla.mozilla.org/show_bug.cgi?id=1994241
Source: Mitre, NVD
Published: 2025-11-11
Updated: 2025-11-12
Base Score: 10
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Severity: Critical
Base Score: 8.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity: High
EPSS: 0.00018