Masteriyo LMS – eLearning and Online Course Builder for WordPress <= 1.13.3 - Authenticated (Student+) Missing Authorization to Privilege Escalation

Vulnerability Description

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.

References

• https://www.wordfence.com/threat-intel/vulnerabilities/id/0c54166e-2af2-409d-8c67-9c07f2028543?source=cve
• https://plugins.trac.wordpress.org/browser/learning-management-system/tags/1.13.3//includes/RestApi/Controllers/Version1/UsersController.php#L1726