CVE-2026-5060

MEDIUM

MasterStudy LMS WordPress Plugin <= 3.7.14 - Instructor Attachment Deletion

Title source: manual

Description

The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.7.14. This is due to the `stm_lms_delete_cover()` function lacking ownership validation on the `file_id` parameter before passing it to `wp_delete_attachment()`. This makes it possible for authenticated attackers, with Instructor-level access and above, to delete arbitrary attachments belonging to any user by enumerating sequential attachment IDs.

References (4)

Core 4

Core References

https://www.wordfence.com/threat-intel/vulnerabilities/id/de11c9ad-0b9f-4934-8dc9-dc324d77d702?source=cve

https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/tags/3.7.14/_core/lms/classes/user.php#L2107

https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/tags/3.7.14/_core/lms/classes/user.php#L2093

https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3501788%40masterstudy-lms-learning-management-system%2Ftrunk&old=3496678%40masterstudy-lms-learning-management-system%2Ftrunk&sfp_email=&sfph_mail=

Scores

CVSS v3 6.5

EPSS 0.0022

EPSS Percentile 12.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-639

Status published

Products (1)

stylemix/MasterStudy LMS WordPress Plugin – for Online Courses and Education < 3.7.23

Published Jul 29, 2026

Tracked Since Jul 29, 2026