CVE-2025-13766: Stylemix Masterstudy Lms WordPress Plugin – For Online Courses And Education

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

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

Affected products

• Stylemix Masterstudy Lms WordPress Plugin – For Online Courses And Education: up to and including 3.7.6

Published 2026-01-06. Last modified 2026-06-17.