CVE-2025-0240
Medium
Description
Parsing a JavaScript module as JSON could, under some circumstances, cause cross-compartment access, which may result in a use-after-free. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
SeverityMedium
CVSS4.0
Exploit probability—
Product
Mozilla Firefox
PublishedJan 7, 2025
First seenJan 7, 2025
Weakness typeCWE-416Use after free
How to fix
Update
- mozilla firefox128.6.0, 134.0 or later
- mozilla thunderbird128.6.0, 134.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 128.6.0, v < 134.0 | 128.6.0, 134.0 |
| mozilla thunderbird | v < 128.6.0, 129.0 ≤ v < 134.0 | 128.6.0, 134.0 |
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