by Kastro
Paper/Archive/CVE-2025-11719

CVE-2025-11719

Mozilla Firefox — Use-after-free caused by the native messaging web extension API on Windows

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
35
CVSS 9.8 (ADP, NVD agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 29.1.291 × 205.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Starting in Thunderbird 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 was fixed in Firefox 144 and Thunderbird 144.

Affected

ProductAffectedFixed inSource
Firefoxsee advisory144CNA
Thunderbirdsee advisory144CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refbugzilla.mozilla.org/show_bug.cgi?id=1991950refmozilla.org/security/advisories/mfsa2025-81refmozilla.org/security/advisories/mfsa2025-84