{"id":"UBUNTU-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demonstrated by an https:example.com URL.","modified":"2025-07-16T07:34:12.153076Z","published":"2016-05-22T01:59:00Z","withdrawn":"2025-07-18T16:43:25Z","upstream":["CVE-2016-2221"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-2221"},{"type":"REPORT","url":"https://wordpress.org/news/2016/02/wordpress-4-4-2-security-and-maintenance-release/"},{"type":"REPORT","url":"https://core.trac.wordpress.org/changeset/36444"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2016/02/04/4"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-2221"}],"affected":[{"package":{"name":"wordpress","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/wordpress@4.4.2+dfsg-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.2+dfsg-1"}]}],"versions":["4.3+dfsg-1","4.3.1+dfsg-1","4.4+dfsg-1","4.4.1+dfsg-1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"wordpress","binary_version":"4.4.2+dfsg-1"},{"binary_version":"4.4.2+dfsg-1","binary_name":"wordpress-l10n"},{"binary_name":"wordpress-theme-twentyfifteen","binary_version":"4.4.2+dfsg-1"},{"binary_name":"wordpress-theme-twentyfourteen","binary_version":"4.4.2+dfsg-1"},{"binary_name":"wordpress-theme-twentysixteen","binary_version":"4.4.2+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2221.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}