CVE-2025-11719
Last modified
CVE-2025-11719 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 0.32% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | >= 143.0, < 144.0 |
| Mozilla | Thunderbird | >= 143.0, < 144.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1991950Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-81/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-84/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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