{"cve":"CVE-2009-2335","nvd":{"published":"2009-07-10T21:00:00.203","modified":"2026-06-16T23:09:14.153","status":"Modified","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.\"","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-16"],"references":["http://corelabs.coresecurity.com/index.php?action=view&type=advisory&name=WordPress_Privileges_Unchecked","http://securitytracker.com/id?1022528","http://www.exploit-db.com/exploits/9110","http://www.osvdb.org/55713","http://www.securityfocus.com/archive/1/504795/100/0/threaded"],"products":["wordpress:wordpress","wordpress:wordpress_mu"],"source":"nvd","synced_at":"2026-10-19T19:54:07.895733559+00:00"},"epss":{"cve":"CVE-2009-2335","score":0.85,"percentile":0.99713,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}