CVE-2025-14330
CRITICALCVSS 9.8/10EPSS 0.42%
Last modified
CVE-2025-14330 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.
Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
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 | < 140.6.0 |
| Mozilla | Firefox | < 146.0 |
| Mozilla | Thunderbird | < 140.6.0 |
| Mozilla | Thunderbird | < 146.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1997503Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-92/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-94/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-95/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-96/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2025-14330?
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
How severe is CVE-2025-14330?
CVE-2025-14330 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.
How do I fix CVE-2025-14330?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2025-14330?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST