CVE-2025-4800: Stylemixthemes Masterstudy Lms Pro

High severity, CVSS 8.8. EPSS: 1.1% chance of exploitation in the next 30 days.

The MasterStudy LMS Pro plugin for WordPress is vulnerable to arbitrary file uploads due to a missing file type validation in the stm_lms_add_assignment_attachment function in all versions up to, and including, 4.7.0. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files on the affected site's server, which may make remote code execution possible.

Affected products

• Stylemixthemes Masterstudy Lms Pro: up to and including 4.7.0

Published 2025-05-28. Last modified 2026-06-17.