CVE-2026-13764

The Masterstudy - Education WordPress Theme theme for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.8.151. This is due to missing authorization and nonce validation on the masterstudy ms stm set discard transient AJAX action. This makes it possible for authenticated attackers, with Subscriber-level access and above, to elevate their privileges to Administrator by setting the stm developer access token transient and using the developer access auto-login flow to obtain administrator session cookies.