9.8
Critical
CVE-2025-1009 An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 135 | earliest → < 135 | 135 |
| Firefox 128.7 | earliest → < 128.7 | 128.7 |
| Firefox 115.20 | earliest → < 115.20 | 115.20 |
| Firefox ESR 128.7 | earliest → < 128.7 | 128.7 |
| Thunderbird 135 | earliest → < 135 | 135 |
| Thunderbird 128.7 | earliest → < 128.7 | 128.7 |
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