Description
JavaScript code running while transforming a document with the XSLTProcessor could lead to a use-after-free. This vulnerability was fixed in Firefox 137, Firefox ESR 115.22, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
115.22 to ≤ 115.*unaffected128.9 to ≤ 128.*unaffected137 to ≤ *unaffected
Mozilla Thunderbird
128.9 to ≤ 128.*unaffected137 to ≤ *unaffected
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1941002 ↗
- https://www.mozilla.org/security/advisories/mfsa2025-20/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-21/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-22/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-23/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-24/ ↗
- https://lists.debian.org/debian-lts-announce/2025/04/msg00005.html ↗