{"id":"CVE-2025-1009","published":"2025-02-04T13:58:51Z","modified":"2026-04-13T14:25:07Z","title":"Use-after-free in XSLT","vendor":"Mozilla","product":"Firefox","tier":"tail","description":{"text":"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.","provenance":"source","from":"CVE.org"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.01207,"percentile":0.68226,"provenance":"source"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1936613","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-07/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-08/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-09/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-10/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-11/","tags":[]},{"url":"https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html","tags":[]},{"url":"https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html","tags":[]}],"priority":{"score":20.5,"factors":[{"name":"EPSS percentile","points":13.65},{"name":"CVSS severity","points":6.86}]},"vendorSlug":"mozilla","euvd":{"id":"EUVD-2025-1964","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-mozilla-firefox-cwe-416"}}