CVE-2025-9181
Medium
Description
Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mozilla Firefox
PublishedAug 19, 2025
First seenAug 19, 2025
Weakness typeCWE-457CWE-457
How to fix
Update
- mozilla firefox128.14.0, 142.0, 140.2.0 or later
- mozilla thunderbird128.14.0, 142.0, 140.2.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 128.14.0, v < 142.0, 140.0 ≤ v < 140.2.0 | 128.14.0, 142.0, 140.2.0 |
| mozilla thunderbird | v < 128.14.0, v < 142.0, 140.0 ≤ v < 140.2.0 | 128.14.0, 142.0, 140.2.0 |
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