The LMS by Masteriyo WordPress plugin before 1.6.8 does not have proper authorization in one some of its REST API endpoints, making it possible for any students to retrieve email addresses of other students

The Masteriyo LMS – eLearning and Online Course Builder for WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the question's content parameter in all versions up to, and including, 1.13.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with student-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Masteriyo LMS – eLearning and Online Course Builder for WordPress plugin for WordPress is vulnerable to unauthorized user profile modification due to missing authorization checks on the /wp-json/masteriyo/v1/users/$id REST API endpoint in all versions up to, and including, 1.13.3. This makes it possible for authenticated attackers, with student-level access and above, to modify the roles of arbitrary users. As a result, attackers can escalate their privileges to the Administrator and demote existing administrators to students.

Missing Authorization vulnerability in masteriyo Masteriyo - LMS learning-management-system.This issue affects Masteriyo - LMS: from n/a through <= 1.11.4.

Missing Authorization vulnerability in masteriyo Masteriyo - LMS learning-management-system.This issue affects Masteriyo - LMS: from n/a through <= 1.11.6.

Authorization Bypass Through User-Controlled Key vulnerability in masteriyo Masteriyo - LMS learning-management-system.This issue affects Masteriyo - LMS: from n/a through <= 1.11.4.