CVE-2025-1009
Critical
Description
An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Mozilla Firefox
PublishedFeb 4, 2025
First seenFeb 4, 2025
Weakness typeCWE-416Use after free
How to fix
Update
- mozilla firefox115.20.0, 135.0, 128.7.0 or later
- mozilla thunderbird128.7.0, 135.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mozilla firefox | v < 115.20.0, v < 135.0, 128.1.0 ≤ v < 128.7.0 | 115.20.0, 135.0, 128.7.0 |
| mozilla thunderbird | 128.0.1 ≤ v < 128.7.0, 131.0 ≤ v < 135.0 | 128.7.0, 135.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.