Medium severity · published Jul 29, 2026
CVE-2026-5060
MasterStudy LMS WordPress Plugin – for Online Courses and Education <= 3.7.14 - Insecure Direct Object Reference to Authenticated (Instructor+) Arbitrary Attachment Deletion
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ML
MasterStudy LMS WordPress Plugin – for Online Courses and Education · stylemix
through 3.7.23 · source: vendor
Affected product
ML
MasterStudy LMS WordPress Plugin – for Online Courses and Education
stylemix
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5060
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5060
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/tags/3.7.14/_core/lms/classes/user.php#L2093
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/masterstudy-lms-learning-management-system/tags/3.7.14/_core/lms/classes/user.php#L2107
plugins.trac.wordpress.org
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=
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/de11c9ad-0b9f-4934-8dc9-dc324d77d702?source=cve
More from MasterStudy LMS WordPress Plugin – for Online Courses and Education
9.8
CVE-2024-3136
MasterStudy LMS <= 3.3.3 - Unauthenticated Local File Inclusion via template
9.8
CVE-2024-2411
MasterStudy LMS <= 3.3.0 - Unauthenticated Local File Inclusion via modal
9.8
CVE-2024-2409
MasterStudy LMS <= 3.3.1 - Unauthenticated Privilege Escalation via stm_lms_register AJAX Action
9.8
CVE-2024-1512
MasterStudy LMS WordPress Plugin – for Online Courses and Education <= 3.2.5 - Unauthenticated SQL Injection
7.5
CVE-2024-2106
MasterStudy LMS WordPress Plugin – for Online Courses and Education <= 3.2.10 - Basic Information Exposure via REST route