CVE-2026-80069
MasterStudy LMS WordPress Plugin < 3.7.50 Missing Authorization via stm_lms_send_test_email_ajax
What happened?
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 software and versions
| Software | Version information | Fixed version |
|---|---|---|
| MasterStudy LMS WordPress PluginStylemix | affected: 0 to < 3.7.50 | See vendor advisory |
Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.
Is it being exploited?
This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.
How to respond
- Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
- Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
- Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.
Sources and remediation references
- https://www.cve.org/CVERecord?id=CVE-2026-80069
- https://docs.stylemixthemes.com/masterstudy-lms/changelog-free-version
- https://wordpress.org/plugins/masterstudy-lms-learning-management-system
- https://www.vulncheck.com/advisories/masterstudy-lms-wordpress-plugin-missing-authorization-via-stm-lms-send-test-email-ajax