{"id":"CVE-2009-0777","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-0777","generatedAt":"2026-10-27T18:39:27.574Z","title":"Mozilla Firefox before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey before 1.1.15 decode invisible characters when they are displayed in the location bar, which causes an incorrect address to be displayed and makes it easier for remote attackers to…","description":"Mozilla Firefox before 3.0.7, Thunderbird before 2.0.0.21, and SeaMonkey before 1.1.15 decode invisible characters when they are displayed in the location bar, which causes an incorrect address to be displayed and makes it easier for remote attackers to spoof URLs and conduct phishing attacks.","published":"2009-03-05T02:30:01.000Z","lastModified":"2026-06-16T23:05:48.000Z","status":"Modified","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"2.0","score":5.8,"severity":"MEDIUM","vector":"AV:N/AC:M/Au:N/C:N/I:P/A:P"},"cwe":["CWE-20"],"affected":["mozilla/firefox","mozilla/seamonkey","mozilla/thunderbird"],"epss":{"score":0.01497,"percentile":0.74039,"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 (1.50%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00002.html","source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/34140","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/34145","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://secunia.com/advisories/34272","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://securitytracker.com/alerts/2009/Mar/1021799.html","source":"secalert@redhat.com"},{"url":"http://support.avaya.com/elmodocs2/security/ASA-2009-069.htm","source":"secalert@redhat.com"},{"url":"http://support.avaya.com/japple/css/japple?temp.documentID=366362&temp.productID=154235&temp.releaseID=361845&temp.bucketID=126655&PAGE=Document","source":"secalert@redhat.com"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:075","source":"secalert@redhat.com"},{"url":"http://www.mozilla.org/security/announce/2009/mfsa2009-11.html","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"http://www.redhat.com/support/errata/RHSA-2009-0315.html","source":"secalert@redhat.com"},{"url":"http://www.securityfocus.com/bid/33990","source":"secalert@redhat.com"},{"url":"http://www.vupen.com/english/advisories/2009/0632","tags":["Vendor Advisory"],"source":"secalert@redhat.com"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=452979","source":"secalert@redhat.com"},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/49087","source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11222","source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6039","source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6157","source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6229","source":"secalert@redhat.com"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7435","source":"secalert@redhat.com"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00002.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/34140","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/34145","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/34272","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://securitytracker.com/alerts/2009/Mar/1021799.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://support.avaya.com/elmodocs2/security/ASA-2009-069.htm","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://support.avaya.com/japple/css/japple?temp.documentID=366362&temp.productID=154235&temp.releaseID=361845&temp.bucketID=126655&PAGE=Document","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mandriva.com/security/advisories?name=MDVSA-2009:075","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.mozilla.org/security/announce/2009/mfsa2009-11.html","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.redhat.com/support/errata/RHSA-2009-0315.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/33990","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2009/0632","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."}