Auth bypass in Stylemix Masterstudy Lms WordPress Plugin – For Online Courses And Education
CVE-2025-13766
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
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (5.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 5.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-13766?
- CVE-2025-13766 is a medium-severity vulnerability in Stylemix Masterstudy Lms WordPress Plugin – For Online Courses And Education, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-01-06.
- How severe is CVE-2025-13766?
- Medium severity. CVSS v3 base score is 5.4 out of 10.