CVE-2026-80069

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.

References

• 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