Academy LMS WordPress plugin vulnerabilities

The Academy LMS WordPress plugin before 4.0.0 does not verify that a quiz question belongs to the course the requesting user is authorized to access before returning that question's answer options. This allows any authenticated user with access to a single course, such as an enrolled student, to read the quiz answer options of questions belonging to other courses they are not enrolled in.

The Academy LMS WordPress plugin before 4.0.0 does not verify course enrollment or object ownership when returning a lesson's content through one of its REST API routes. This allows users with a self-registerable student account to read the full content of arbitrary lessons, including lessons of paid or private courses they are not enrolled in.

The Academy LMS WordPress plugin before 3.8.3 does not verify course enrollment or lesson publication status when returning a single lesson via REST API. Users with a Subscriber-level account can disclose the content of arbitrary lessons, including paid course lessons they are not enrolled in and unpublished lessons.

The Academy LMS WordPress plugin before version 3.8.1 does not verify ownership of user identifiers in several AJAX handlers. Authenticated users with subscriber-level access can read and modify other users' lesson notes and mark their content as completed.