CVE-2025-13766 Missing authorization in MasterStudy LMS WordPress Plugin – for Online Courses and Education
Authenticated subscribers can modify or delete posts and media files due to missing capability checks in REST API endpoints.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-13766?
CVE-2025-13766 is a medium-severity missing authorization vulnerability in stylemix MasterStudy LMS WordPress Plugin – for Online Courses and Education, published on 6 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to unauthorized modification and deletion of data due to a missing capability checks on multiple REST API endpoints in all versions up to, and including, 3.7.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload or delete arbitrary media files, delete or modify posts, and create/manage course templates
Weakness: CWE-862
Which versions are affected by CVE-2025-13766?
How do I fix CVE-2025-13766?
No fix has been published for CVE-2025-13766 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-13766 being exploited?
There is no known exploitation of CVE-2025-13766 in the wild and no public exploit code.
Sources
Also known as GHSA-76rq-mr82-f3r3.