Vulnerability · Published Oct 29, 2026 · Assigned by VulnCheck

CVE-2026-80069MasterStudy LMS WordPress Plugin < 3.7.50 Missing Authorization via stm_lms_send_test_email_ajax

Medium 5.4

In plain English

A medium-severity missing authorization in MasterStudy LMS WordPress Plugin from Stylemix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.4%top 71.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Stylemix	MasterStudy LMS WordPress Plugin	0 – before 3.7.50

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

References

Changelog release-notes, patch
WordPress Plugin Download Page product
VulnCheck Advisory: MasterStudy LMS WordPress Plugin < 3.7.50 Missing Authorization via stm_lms_send_test_email_ajax third-party-advisory