What’s Vulnerable › Vulnerabilities

CVE-2025-4800: MasterStudy LMS Pro <= 4.7.0 - Authenticated (Subscriber+) Arbitrary File Upload

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-28 · updated 2026-06-17
• Weakness: CWE-434

Description

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: through 4.7.0

References

• https://docs.stylemixthemes.com/masterstudy-lms/changelog-pro-version
• https://stylemixthemes.com/wordpress-lms-plugin/
• https://themeforest.net/item/masterstudy-education-center-wordpress-theme/12170274/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/c170a228-4abd-4ee6-ba37-bdcde1cb7fc5?source=cve

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