CVE-2025-11719CRITICAL 9.8EPSS p23.9%

CVE-2025-11719CVE-2025-11719

Description

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.32% probability of exploitation · percentile 23.9% · 2026-06-18T12:00:27Z
Published2025-10-14
Last modified2026-04-13

Underlying weaknesses· 1

CWE-416

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=1991950
  2. https://www.mozilla.org/security/advisories/mfsa2025-81/
  3. https://www.mozilla.org/security/advisories/mfsa2025-84/

1

TypeTargetConfidenceTier
WeaknessUse After Freecwe-4160%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.