{"id":"CVE-2025-6429","details":"Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an `embed` tag.  This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability affects Firefox \u003c 140, Firefox ESR \u003c 128.12, Thunderbird \u003c 140, and Thunderbird \u003c 128.12.","modified":"2026-04-16T00:07:52.476211999Z","published":"2025-06-24T13:15:23.877Z","related":["ALSA-2025:10072","ALSA-2025:10073","ALSA-2025:10074","SUSE-SU-2025:02122-1","SUSE-SU-2025:02123-1","SUSE-SU-2025:02339-1","SUSE-SU-2025:02368-1","SUSE-SU-2025:02529-1","SUSE-SU-2025:02546-1","SUSE-SU-2025:21170-1","openSUSE-SU-2025:15216-1","openSUSE-SU-2025:15312-1","openSUSE-SU-2025:15315-1","openSUSE-SU-2025:15325-1","openSUSE-SU-2025:20135-1"],"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-54/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-55/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-51/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-53/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1970658"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-6429.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"128.12.0"}]},{"events":[{"introduced":"0"},{"fixed":"140.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"}]}