{"id":"CVE-2016-2221","url":"https://www.cyber-defence.io/tools/cve/CVE-2016-2221","generatedAt":"2026-10-27T22:04:06.996Z","title":"Open redirect vulnerability in the wp_validate_redirect function in wp-includes/pluggable.php in WordPress before 4.4.2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a malformed URL that triggers…","description":"Open redirect vulnerability in the wp_validate_redirect function in wp-includes/pluggable.php in WordPress before 4.4.2 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a malformed URL that triggers incorrect hostname parsing, as demonstrated by an https:example.com URL.","published":"2016-05-22T01:59:14.000Z","lastModified":"2026-06-17T00:43:42.000Z","status":"Modified","sourceIdentifier":"security@debian.org","cvss":{"version":"3.0","score":7.4,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N"},"cwe":[],"affected":["wordpress/wordpress"],"epss":{"score":0.04446,"percentile":0.91347,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.debian.org/security/2016/dsa-3472","source":"security@debian.org"},{"url":"http://www.securityfocus.com/bid/82463","source":"security@debian.org"},{"url":"http://www.securitytracker.com/id/1034933","source":"security@debian.org"},{"url":"https://codex.wordpress.org/Version_4.4.2","tags":["Patch"],"source":"security@debian.org"},{"url":"https://core.trac.wordpress.org/changeset/36444","tags":["Patch"],"source":"security@debian.org"},{"url":"https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/","tags":["Patch","Vendor Advisory"],"source":"security@debian.org"},{"url":"https://wpvulndb.com/vulnerabilities/8377","source":"security@debian.org"},{"url":"http://www.debian.org/security/2016/dsa-3472","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/82463","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securitytracker.com/id/1034933","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://codex.wordpress.org/Version_4.4.2","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://core.trac.wordpress.org/changeset/36444","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/","tags":["Patch","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://wpvulndb.com/vulnerabilities/8377","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2016-2221","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."}