MasterStudy LMS <= 3.6.20 - Authenticated (Subscriber+) Race Condition to Multiple Reviews

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE CVE-2025-59577
CVSS Medium (4.3)
Publicly Published September 22, 2025
Last Updated September 26, 2025
Researcher Bibek Dhakal
Description

The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to a race condition in all versions up to, and including, 3.6.20. This makes it possible for authenticated attackers, with Subscriber-level access and above, to leave multiple reviews on a course.

References

1 affected software package

Software Type Plugin
Software Slug masterstudy-lms-learning-management-system (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 3.6.20
Patched Version
  • 3.6.21
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