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.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://docs.stylemixthemes.com/masterstudy-lms/changelog-free-version release-notes, patch
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · stylemixNVD modified 2026-10-29 14:12
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 3
- https://docs.stylemixthemes.com/masterstudy-lms/changelog-free-version release-notes, patch
- https://wordpress.org/plugins/masterstudy-lms-learning-management-system product
- https://www.vulncheck.com/advisories/masterstudy-lms-wordpress-plugin-missing-authorization-via-stm-lms-send-test-email-ajax third-party-advisory