CVE-2025-11719

critical

Description

Starting in Firefox 143, the use of the native messaging API by web extensions on Windows could lead to crashes caused by use-after-free memory corruption. This vulnerability affects Firefox < 144 and Thunderbird < 144.

References

https://www.mozilla.org/security/advisories/mfsa2025-84/

https://www.mozilla.org/security/advisories/mfsa2025-81/

https://bugzilla.mozilla.org/show_bug.cgi?id=1991950

Details

Source: Mitre, NVD

Published: 2025-10-14

Updated: 2025-10-15

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H