CVE-2025-11711
Medium
Description
There was a way to change the value of JavaScript Object properties that were supposed to be non-writeable. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mozilla Firefox
PublishedOct 14, 2025
First seenOct 14, 2025
Weakness typeCWE-591CWE-591
How to fix
Update
- mozilla firefox115.29.0, 144.0, 140.4.0 or later
- mozilla thunderbird140.4.0, 144.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.29.0, v < 144.0, 116.0 ≤ v < 140.4.0 | 115.29.0, 144.0, 140.4.0 |
| mozilla thunderbird | v < 140.4.0, 141.0 ≤ v < 144.0 | 140.4.0, 144.0 |
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