{"id":"CVE-2009-1309","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-1309","generatedAt":"2026-10-27T20:41:53.395Z","title":"Mozilla Firefox before 3.0.9, Thunderbird, and SeaMonkey do not properly implement the Same Origin Policy for (1) XMLHttpRequest, involving a mismatch for a document's principal, and (2) XPCNativeWrapper.toString, involving an incorrect __proto__ scope,…","description":"Mozilla Firefox before 3.0.9, Thunderbird, and SeaMonkey do not properly implement the Same Origin Policy for (1) XMLHttpRequest, involving a mismatch for a document's principal, and (2) XPCNativeWrapper.toString, involving an incorrect __proto__ scope, which allows remote attackers to conduct cross-site scripting (XSS) attacks and possibly other attacks via a crafted document.","published":"2009-04-22T18:30:00.000Z","lastModified":"2026-06-16T23:07:00.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":4.3,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N"},"cwe":["CWE-16"],"affected":["mozilla/firefox","mozilla/seamonkey","mozilla/thunderbird"],"epss":{"score":0.01351,"percentile":0.71327,"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 (1.35%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00000.html","source":"secalert@redhat.com"},{"url":"http://rhn.redhat.com/errata/RHSA-2009-0437.html","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/34758","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/34780","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/34843","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/34844","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/34894","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/35042","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/35065","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/35536","source":"secalert@redhat.com"},{"url":"http://sunsolve.sun.com/search/document.do?assetkey=1-66-264308-1","source":"secalert@redhat.com"},{"url":"http://www.debian.org/security/2009/dsa-1797","source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:111","source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:141","source":"secalert@redhat.com"},{"url":"http://www.mozilla.org/security/announce/2009/mfsa2009-19.html","tags":["Vendor 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BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}