Exposure of Sensitive Information to an Unauthorized Actor
A flaw was found in moodle before 3.1.13, 3.2.x, 3.3.x before 3.3.7, 3.4.x before 3.4.4, 3.5.x before 3.5.1. It was possible for the core_course_get_categories web service to return hidden categories, which should be omitted when fetching course categories.
CWE-200 - Information Exposure
An information exposure vulnerability is categorized as an information flow (IF) weakness, which can potentially allow unauthorized access to otherwise classified information in the application, such as confidential personal information (demographics, financials, health records, etc.), business secrets, and the application's internal environment.