CVE-2025-14331
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mozilla Firefox
PublishedDec 9, 2025
First seenDec 9, 2025
Weakness typeCWE-346CWE-346
How to fix
Update
- mozilla firefox115.31.0, 146.0, 140.6.0 or later
- mozilla thunderbird140.6.0, 146.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.31.0, v < 146.0, 116.0 ≤ v < 140.6.0 | 115.31.0, 146.0, 140.6.0 |
| mozilla thunderbird | v < 140.6.0, v < 146.0 | 140.6.0, 146.0 |
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