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.

Classification

CVE ID: CVE-2025-4800

CVSS Base Severity: HIGH

CVSS Base Score: 8.8

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products

Vendor: StylemixThemes

Product: MasterStudy LMS Pro

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.25% (probability of being exploited)

EPSS Percentile: 48.05% (scored less or equal to compared to others)

EPSS Date: 2025-06-03 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-4800
https://www.wordfence.com/threat-intel/vulnerabilities/id/c170a228-4abd-4ee6-ba37-bdcde1cb7fc5?source=cve
https://stylemixthemes.com/wordpress-lms-plugin/
https://themeforest.net/item/masterstudy-education-center-wordpress-theme/12170274/
https://docs.stylemixthemes.com/masterstudy-lms/changelog-pro-version

Timeline