MasterStudy LMS <= 3.3.1 — Unauthenticated Privilege Escalation via stm_lms_register AJAX Action
CVE-2024-2409Published · Updated Action summary
Affected: ≤3.3.1Update to 3.3.2 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
MasterStudy LMS WordPress Plugin – for Online Courses and Education masterstudy-lms-learning-management-system
- Affected≤ 3.3.1
- Patched in3.3.2
Update to 3.3.2 or newer.
You are affected if you run ≤ 3.3.1. Version 3.3.2 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under MasterStudy LMS WordPress Plugin – for Online Courses and Education.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 3.3.2, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch MasterStudy LMS WordPress Plugin – for Online Courses and Education to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Hiroho Shimada.
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in MasterStudy LMS WordPress Plugin – for Online Courses and Education
All 60| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium5.4 | Authenticated (Subscriber+) Arbitrary Shortcode Exeuction ≤3.7.56Update to 3.7.57 | CVE-2026-119478 | |
| High7.5 | Authenticated (Subscriber+) PHP Object Injection ≤3.7.55Update to 3.7.56 | CVE-2026-118090 | |
| Medium4.3 | Missing Authorization ≤3.7.55Update to 3.7.56 | CVE-2026-118092 | |
| Medium4.3 | Missing Authorization ≤3.7.49Update to 3.7.50 | CVE-2026-80069 | |
| Medium4.3 | Authenticated (Custom+) Path Traversal ≤3.7.49Update to 3.7.50 | CVE-2026-80067 |
- Medium5.4Authenticated (Subscriber+) Arbitrary Shortcode Exeuction
≤3.7.56Update to 3.7.57
- High7.5Authenticated (Subscriber+) PHP Object Injection
≤3.7.55Update to 3.7.56
- Medium4.3Missing Authorization
≤3.7.55Update to 3.7.56
- Medium4.3Missing Authorization
≤3.7.49Update to 3.7.50
- Medium4.3Authenticated (Custom+) Path Traversal
≤3.7.49Update to 3.7.50
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.