CVE-2025-5263
Medium
Description
Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Mozilla Firefox
PublishedMay 27, 2025
First seenMay 27, 2025
Weakness typeCWE-346CWE-346
How to fix
Update
- mozilla firefox115.24.0, 139.0, 128.11.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.24.0, v < 139.0, 116.0 ≤ v < 128.11.0 | 115.24.0, 139.0, 128.11.0 |
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