CVE-2025-10529
Medium
Description
Same-origin policy bypass in the Layout component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mozilla Firefox
PublishedSep 16, 2025
First seenSep 16, 2025
Weakness typeCWE-942CWE-942
How to fix
Update
- mozilla firefox140.3.0, 143.0 or later
- mozilla thunderbird143.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 140.3.0, v < 143.0 | 140.3.0, 143.0 |
| mozilla thunderbird | v < 143.0 | 143.0 |
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