{"id":"CVE-2012-1961","url":"https://www.cyber-defence.io/tools/cve/CVE-2012-1961","generatedAt":"2026-10-27T23:20:36.798Z","title":"Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 do not properly handle duplicate values in X-Frame-Options headers, which makes it easier for…","description":"Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 do not properly handle duplicate values in X-Frame-Options headers, which makes it easier for remote attackers to conduct clickjacking attacks via a FRAME element referencing a web site that produces these duplicate values.","published":"2012-07-18T10:26:49.000Z","lastModified":"2026-06-16T23:40:41.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N"},"cwe":["CWE-20"],"affected":["mozilla/firefox","mozilla/thunderbird","mozilla/thunderbird esr","mozilla/seamonkey"],"epss":{"score":0.02118,"percentile":0.81732,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (2.12%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00011.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00012.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00013.html","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00016.html","source":"cve@mitre.org"},{"url":"http://osvdb.org/84003","source":"cve@mitre.org"},{"url":"http://rhn.redhat.com/errata/RHSA-2012-1088.html","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49965","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49968","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49972","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49977","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49979","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49992","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49993","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/49994","source":"cve@mitre.org"},{"url":"http://www.mozilla.org/security/announce/2012/mfsa2012-51.html","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/54584","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id?1027256","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id?1027257","source":"cve@mitre.org"},{"url":"http://www.securitytracker.com/id?1027258","source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-1509-1","source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-1509-2","source":"cve@mitre.org"},{"url":"http://www.ubuntu.com/usn/USN-1510-1","source":"cve@mitre.org"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=761655","source":"cve@mitre.org"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16993","source":"cve@mitre.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00011.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00012.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00013.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2012-07/msg00016.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://osvdb.org/84003","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://rhn.redhat.com/errata/RHSA-2012-1088.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49965","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49968","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49972","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49977","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49979","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49992","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49993","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/49994","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mozilla.org/security/announce/2012/mfsa2012-51.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/54584","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1027256","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1027257","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id?1027258","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1509-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1509-2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.ubuntu.com/usn/USN-1510-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=761655","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16993","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2012-1961","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}