MasterStudy LMS - Security Vulnerability (CVE-2026-80069)

Q: Am I affected by this vulnerability?

You are affected if your site runs MasterStudy LMS. Versions below 3.7.50 are vulnerable; that release and later are not. An attacker needs any registered account, so open registration materially increases the risk.

Q: How do I fix it?

Update MasterStudy LMS to version 3.7.50 or later. That is the complete fix. Until you can update, Request / payload inspection (WAF) in Hack Halt ProSecure contains this class of attack at the request layer.

Q: What can an attacker actually do?

This is a Broken Access Control flaw. An attacker who exploits it can reach actions or data that should have been restricted to someone else.

CVE-2026-80069

Vulnerability CVE-2026-80069 PLUGIN masterstudy-lms MEDIUM

MasterStudy LMS plugin for WordPress before 3.7.50 contains a missing authorization vulnerability that allows any authenticated user, including Subscribers, to trigger the stm_lms_send_test_email_ajax AJAX action without capability or nonce validation. Attackers can invoke this handler directly or via cross-site request forgery to cause an uncaught PHP fatal error that, when display_errors is enabled, discloses the absolute filesystem path of the plugin.

CVE-2026-80069

MEDIUM CVSS 5.3 Published 2026-10-29 Updated 2026-11-02

AI Risk Moderate (52/100) Active Exploit: No strong signal Published Exploit: No public exploit references Priority: P4 Planned

Severity Band MEDIUM

CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected Components 2

Reference Links 3

AI Risk Engine Moderate (52/100)

Exploitability Low

Active Exploitation No strong signal

Published Exploit Status No public exploit references

Threat Timeline

2026-10-29 CVE published and first recorded in the threat feed.
2026-11-02 Record updated with latest vulnerability metadata.
2026-11-07 AI technical context refreshed for mitigation and impact guidance.
Now Monitoring for follow-up changes, linked references, and new related CVEs.

AI Context

Machine-generated threat intelligence

AI Updated 4 days ago

AI enriched 4 days ago (2026-11-07 20:25 UTC)

Technical Summary

Potential Impact

Severity is MEDIUM (CVSS 5.3). Depending on deployment context, affected components may be exposed to unauthorized actions or data integrity risk.

Exploitability Assessment

Exploitability is assessed as Low based on low-bar exploit prerequisites.

Primary risk drivers: low-bar exploit prerequisites

Mitigation Recommendations

Validate affected product versions, prioritize patching, and monitor references for vendor remediation guidance. If immediate patching is not possible, apply compensating controls and limit exposure of vulnerable surfaces.

Detection & Monitoring

Track authentication anomalies, unexpected file writes, and suspicious plugin API activity around affected components.

Business Impact Lens

AI risk score 52/100 (Moderate, Low) with priority P4 Planned. Prioritize remediation where affected components process customer data, admin sessions, or Internet-exposed workflows.

Affected Products

MasterStudy LMS PLUGIN · masterstudy-lms Affected: < 3.7.50 Fixed in: 3.7.50

Masterstudy Lms Learning Management System PLUGIN · masterstudy-lms-learning-management-system Affected: < 3.7.50 Fixed in: 3.7.50

References

What to do about this

Patch promptly The consequence is significant even where an attacker needs a foothold first.

Fix it

Update MasterStudy LMS to 3.7.50 or later.

That is the complete fix. Everything below is what protects you in the meantime.

Cannot update today? Request / payload inspection (WAF) in Hack Halt ProSecure blocks this class of attack before WordPress processes the request.

Inspect request parameters and bodies for injection, traversal and file-inclusion payloads, and refuse the request rather than logging it.

Compare Hack Halt plans Start free

Not sure if you are affected?

Scan your site to see whether it runs MasterStudy LMS, and at which version.

Free, no installation, no account. It reads what your site already publishes, then tells you which plugins carry known vulnerabilities and what to do about each one.

Scan my site free See what Hack Halt does

Am I affected by this vulnerability?