CVE-2025-14441

The Popupkit plugin for WordPress is vulnerable to arbitrary subscriber data deletion due to missing authorization on the DELETE `/subscribers` REST API endpoint in all versions up to, and including, 2.2.0. This is due to the `permission_callback` only validating wp_rest nonce without checking user capabilities. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete arbitrary subscriber records.

• https://plugins.trac.wordpress.org/browser/popup-builder-block/tags/2.2.0/includes/Routes/Subscribers.php#L64
• https://plugins.trac.wordpress.org/browser/popup-builder-block/tags/2.2.0/includes/Routes/Subscribers.php#L77
• https://plugins.trac.wordpress.org/browser/popup-builder-block/trunk/includes/Routes/Subscribers.php#L77
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3421671%40popup-builder-block&new=3421671%40popup-builder-block&sfp_email=&sfph_mail=
• https://www.wordfence.com/threat-intel/vulnerabilities/id/48f5a44d-d01f-4c41-98da-7c1f6c65c254?source=cve