{"id":"CVE-2025-5266","details":"Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox \u003c 139, Firefox ESR \u003c 128.11, Thunderbird \u003c 139, and Thunderbird \u003c 128.11.","modified":"2026-03-12T02:17:34.136987Z","published":"2025-05-27T13:15:22.403Z","related":["ALSA-2025:8293","ALSA-2025:8308","ALSA-2025:8341","ALSA-2025:8607","ALSA-2025:8608","ALSA-2025:8756","MGASA-2025-0195","MGASA-2025-0197","SUSE-SU-2025:01769-1","SUSE-SU-2025:01814-1","SUSE-SU-2025:01946-1","SUSE-SU-2025:21170-1","openSUSE-SU-2025:15170-1","openSUSE-SU-2025:15174-1","openSUSE-SU-2025:15196-1","openSUSE-SU-2025:15315-1","openSUSE-SU-2025:20135-1"],"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-42/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-44/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-45/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-46/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1965628"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-5266.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"128.11.0"}]},{"events":[{"introduced":"0"},{"fixed":"139.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"}]}