CVE-2016-2221: WordPress

High severity, CVSS 7.4. EPSS: 4.4% chance of exploitation in the next 30 days.

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.

Affected products

• WordPress WordPress: up to and including 4.4.1

Published 2016-05-22. Last modified 2026-06-17.