CVE-2025-14331
MEDIUMCVSS 6.5/10EPSS 0.16%
Last modified
CVE-2025-14331 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Same-origin policy bypass in the Request Handling component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.
Description
Same-origin policy bypass in the Request Handling component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 115.31.0 |
| Mozilla | Firefox | < 146.0 |
| Mozilla | Firefox | >= 116.0, < 140.6.0 |
| Mozilla | Thunderbird | < 140.6.0 |
| Mozilla | Thunderbird | < 146.0 |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2000218Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2025-92/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-93/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-2025-14331?
Same-origin policy bypass in the Request Handling component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
How severe is CVE-2025-14331?
CVE-2025-14331 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2025-14331?
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.
How Strix Helps
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Are you affected by CVE-2025-14331?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST