CVE-2024-2409 - CVE House
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Status published Critical CVE-2024-2409

MasterStudy LMS <= 3.3.1 - Unauthenticated Privilege Escalation via stm_lms_register AJAX Action

Vulnerability Description

The MasterStudy LMS plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.3.1. This is due to insufficient validation checks within the _register_user() function called by the 'wp_ajax_nopriv_stm_lms_register' AJAX action. This makes it possible for unauthenticated attackers to register a user with administrator-level privileges when MasterStudy LMS Pro is installed and the LMS Forms Editor add-on is enabled.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Hiroho Shimada

References

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Affected Vendor

Affected Software

MasterStudy LMS WordPress Plugin – for Online Courses and Education
Vulnerable Versions:
0

Timeline

Official Publish: March 29th, 2024
Last Modified: April 8th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-266

MITRE ATT&CK TTPs

T1078 Valid Accounts
Persistence
T1098 Account Manipulation
Privilege Escalation
T1548 Abuse Elevation Control Mechanism
Privilege Escalation
T1484 Domain or Tenant Policy Modification
Defense Evasion
T1021 Remote Services
Lateral Movement