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CVE-2025-13766

MasterStudy LMS WordPress Plugin – for Online Courses and Education <= 3.7.6 Missing Authorization to Authenticated (Subscriber+) Posts and Media Creation, Modification and Deletion

Published: Jan 6, 2026Updated: Jan 8, 2026 Sources: CVE List NVDCWE-862
NVD MITRE
5.4CVSSMEDIUM
EPSS Score
0.1%
Top 95.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
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Description

The MasterStudy LMS WordPress Plugin – for Online Courses and Education plugin for WordPress is vulnerable to unauthorized modification and deletion of data due to a missing capability checks on multiple REST API endpoints in all versions up to, and including, 3.7.6. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload or delete arbitrary media files, delete or modify posts, and create/manage course templates

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-862

Affected Products

MasterStudy LMS WordPress Plugin – for Online Courses and Educationstylemix
Mixed
Web & CMS Plugins / wordpress-plugin
stylemixcommercialWeb & CMS Plugins

Attack Graph

Products CVE Techniques Tactics

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Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

2 techniques
Initial Access
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References

https://plugins.trac.wordpress.org/changeset/3422825/
plugins.trac.wordpress.org
https://www.wordfence.com/threat-intel/vulnerabilities/id/2719739a-90dc-470b-9270-8578e0cead59?source=cve
wordfence.com

Timeline

Published
Jan 6, 2026
Last Updated
Jan 8, 2026

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