{"id":"CVE-2021-38492","details":"When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. *This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 92, Thunderbird \u003c 91.1, Thunderbird \u003c 78.14, Firefox ESR \u003c 78.14, and Firefox ESR \u003c 91.1.","modified":"2026-03-15T22:41:29.828163Z","published":"2021-11-03T01:15:07.200Z","related":["SUSE-SU-2021:14821-1","SUSE-SU-2021:14826-1","SUSE-SU-2021:3191-1","SUSE-SU-2021:3331-1","SUSE-SU-2021:3451-1","SUSE-SU-2021:4150-1","SUSE-SU-2022:1577-1","SUSE-SU-2022:1582-1","openSUSE-SU-2021:1367-1","openSUSE-SU-2021:1635-1","openSUSE-SU-2021:3331-1","openSUSE-SU-2021:3451-1","openSUSE-SU-2021:4150-1","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/mfsa2021-38/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-39/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-40/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-41/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2021-42/"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-14"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1721107"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-38492.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"92.0"}]},{"events":[{"introduced":"91.0"},{"fixed":"91.1"}]},{"events":[{"introduced":"0"},{"fixed":"78.14"}]},{"events":[{"introduced":"0"},{"fixed":"78.14"}]},{"events":[{"introduced":"91.0"},{"fixed":"91.1"}]}]}}],"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"}]}