{"id":"CVE-2018-12395","details":"By rewriting the Host: request headers using the webRequest API, a WebExtension can bypass domain restrictions through domain fronting. This would allow access to domains that share a host that are otherwise restricted. This vulnerability affects Firefox ESR \u003c 60.3 and Firefox \u003c 63.","modified":"2026-04-16T06:20:51.355813397Z","published":"2019-02-28T18:29:00.743Z","related":["SUSE-SU-2018:3656-1","SUSE-SU-2018:3749-1","SUSE-SU-2018:3749-2","SUSE-SU-2018:3749-3","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1041944"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3005"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2018/11/msg00008.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201811-04"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2018-26/"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/105718"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:3006"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3801-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2018/dsa-4324"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2018-27/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1467523"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-12395.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"63.0"}]},{"events":[{"introduced":"0"},{"fixed":"60.3"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.10"}]},{"events":[{"introduced":"0"},{"last_affected":"6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.5"}]},{"events":[{"introduced":"0"},{"last_affected":"6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}