The ACPT (Premium) plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 2.0.66. This is due to missing authorization in the `submit()` function, which allows unauthenticated form submissions to control the target user ID before calling `wp_update_user()`. This makes it possible for unauthenticated attackers to overwrite any WordPress user's email address and password, including an administrator's, and take over the account. Successful exploitation requires a public ACPT user form that permits anonymous submissions.

The ACPT (Premium) plugin for WordPress contains a critical privilege escalation vulnerability affecting all versions up to and including 2.0.66. The flaw resides in the submit() function, which lacks proper authorization checks, allowing unauthenticated attackers to manipulate the target user ID in form submissions. By exploiting this, an attacker can overwrite any WordPress user's email address and password, including administrator accounts, effectively taking full control. Exploitation is possible when a public ACPT user form that permits anonymous submissions is present on the site. This vulnerability enables complete account takeover without any prior authentication. The issue has been documented by both NVD and Wordfence threat intelligence. Site administrators are urged to update beyond version 2.0.66 immediately to mitigate risk.