CVE-2025-14441 Popupkit <= 2.2.0 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Subscriber Data Deletion

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 permissioncallback only validating wprest nonce without checking user...