{"id":"CVE-2016-2221","details":"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.","modified":"2026-07-08T12:54:03.087281Z","published":"2016-05-22T01:59:14.103Z","references":[{"type":"WEB","url":"http://www.securityfocus.com/bid/82463"},{"type":"WEB","url":"http://www.securitytracker.com/id/1034933"},{"type":"WEB","url":"https://wpvulndb.com/vulnerabilities/8377"},{"type":"ADVISORY","url":"http://www.debian.org/security/2016/dsa-3472"},{"type":"FIX","url":"https://codex.wordpress.org/Version_4.4.2"},{"type":"FIX","url":"https://core.trac.wordpress.org/changeset/36444"},{"type":"FIX","url":"https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wordpress/wordpress","events":[{"introduced":"0"},{"last_affected":"80d1f99a89bd7c892d2dccec915e62e8e4a6f8bb"}],"database_specific":{"cpe":"cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"4.4.1"}],"source":"CPE_RANGE"}}],"versions":["4.4.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-2221.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/wordpress/wordpress-develop","events":[{"introduced":"0"},{"last_affected":"b5ed4b53bf0ea238d7a9dba8b670a8a096a22288"}],"database_specific":{"cpe":"cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"last_affected":"4.4.1"}],"source":"CPE_RANGE"}}],"versions":["4.4.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-2221.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N"}]}