Multiple cross-site scripting (XSS) vulnerabilities in wp-includes/functions.php in WordPress before 2.1.2-alpha allow remote attackers to inject arbitrary web script or HTML via (1) the Referer HTTP header or (2) the URI, a different vulnerability than CVE-2007-1049.

In WordPress before 5.2.3, validation and sanitization of a URL in wp_validate_redirect in wp-includes/pluggable.php could lead to an open redirect if a provided URL path does not start with a forward slash.

Open redirect vulnerability in age-verification.php in the Age Verification plugin 0.4 and earlier for WordPress allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the redirect_to parameter.

WordPress 3.1 before 3.1.3 and 3.2 before Beta 2 does not prevent rendering for (1) admin or (2) login pages inside a frame in a third-party HTML document, which makes it easier for remote attackers to conduct clickjacking attacks via a crafted web site.

Before WordPress 4.9.5, the URL validator assumed URLs with the hostname localhost were on the same host as the WordPress server.

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.

Before WordPress 4.9.5, the redirection URL for the login page was not validated or sanitized if forced to use HTTPS.

In WordPress before 4.7.3 (wp-includes/pluggable.php), control characters can trick redirect URL validation.