{"id":"CVE-2021-23973","details":"When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox \u003c 86, Thunderbird \u003c 78.8, and Firefox ESR \u003c 78.8.","modified":"2026-04-16T04:36:06.001150500Z","published":"2021-02-26T02:15:13.243Z","related":["SUSE-SU-2021:0659-1","SUSE-SU-2021:0661-1","SUSE-SU-2021:0667-1","SUSE-SU-2021:0676-1","SUSE-SU-2021:14657-1","openSUSE-SU-2021:0373-1","openSUSE-SU-2021:0387-1","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:10601-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-09/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/03/msg00000.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202104-09"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202104-10"},{"type":"ADVISORY","url":"https://www.debian.org/security/2021/dsa-4866"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-07/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-08/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1690976"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"86.0"}]},{"events":[{"introduced":"0"},{"fixed":"78.8"}]},{"events":[{"introduced":"0"},{"fixed":"78.8"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23973.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"}]}