{"id":"CVE-2009-2335","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-2335","generatedAt":"2026-10-27T21:43:19.733Z","title":"WordPress and WordPress MU before 2.8.1 exhibit different behavior for a failed login attempt depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.","description":"WordPress and WordPress MU before 2.8.1 exhibit different behavior for a failed login attempt depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.  NOTE: the vendor reportedly disputes the significance of this issue, indicating that the behavior exists for \"user convenience.\"","published":"2009-07-10T21:00:00.000Z","lastModified":"2026-06-16T23:09:14.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"2.0","score":5,"severity":"MEDIUM","vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N"},"cwe":["CWE-16"],"affected":["wordpress/wordpress","wordpress/wordpress mu"],"epss":{"score":0.85,"percentile":0.9971,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":1,"verified":false,"firstPublished":"2011-08-20","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":17702,"kind":"exploit","title":"WordPress Plugin Block-Spam-By-Math-Reloaded - Bypass","url":"https://www.exploit-db.com/exploits/17702","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/webapps/17702.rb","file":"exploits/php/webapps/17702.rb","published":"2011-08-20","added":"2011-08-20","updated":"2011-08-20","author":"Tiago Ferreira & Heyder Andrade","type":"webapps","platform":"php","port":null,"verified":false,"codes":["CVE-2009-2335","OSVDB-55713"],"tags":"WordPress Plugin","aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 85.0%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://corelabs.coresecurity.com/index.php?action=view&type=advisory&name=WordPress_Privileges_Unchecked","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://securitytracker.com/id?1022528","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.exploit-db.com/exploits/9110","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.osvdb.org/55713","tags":["Broken Link"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/archive/1/504795/100/0/threaded","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/35581","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://www.vupen.com/english/advisories/2009/1833","tags":["Patch","Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00597.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00608.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00632.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00676.html","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://corelabs.coresecurity.com/index.php?action=view&type=advisory&name=WordPress_Privileges_Unchecked","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://securitytracker.com/id?1022528","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.exploit-db.com/exploits/9110","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.osvdb.org/55713","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/archive/1/504795/100/0/threaded","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/35581","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2009/1833","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00597.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.redhat.com/archives/fedora-package-announce/2009-August/msg00608.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00632.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.redhat.com/archives/fedora-package-announce/2009-July/msg00676.html","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-2335","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."}