ClassroomIO through 1.0.0 Cross-Organization Course Disclosure via Clone Endpoint

ClassroomIO through 1.0.0 contains an authorization bypass vulnerability that allows authenticated users of any organization to clone other tenants' courses via the POST /course/:courseId/clone endpoint. Attackers who know a target course id can copy its sections, lessons, exercises, and quiz answer keys into their own organization, exposing private course content.

ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routes

ClassroomIO through 1.0.0 contains an incorrect authorization vulnerability in the PUT and DELETE /:lessonId lesson routes that allows any course member, including students, to modify lessons. Authenticated students can supply arbitrary lesson ids to change titles and stored HTML content or delete lessons in their course and in other courses and organizations.

ClassroomIO through 1.0.0 IDOR via Course Submission Update, Grade and Delete Routes

ClassroomIO through 1.0.0 contains an insecure direct object reference vulnerability in the Hono API course submission routes that allows course tutors or admins to modify submissions in other courses. Attackers can supply their own course id with another course's submission UUID to PUT or DELETE handlers to overwrite answers, grades, feedback, and grading status or delete submissions.

Student Accounts Can Retrieve Unauthorized Course Information by Modifying API Requests

A Broken Access Control vulnerability exists in ClassroomIO v0.1.13 where an authenticated low-privileged "student" user can access unauthorized course-level information by modifying intercepted API requests. Changing a captured POST request to a GET request against the /rest/v1/course PostgREST endpoint results in disclosure of sensitive information including other students details, tutor/admin profiles, and internal course metadata.

An issue in ClasroomIO before v.0.2.6 allows a remote attacker to escalate privileges via the endpoints /api/verify and /rest/v1/profile

Insecure Direct Object Reference (IDOR) in classroomio 0.1.13 allows unauthorized share and invite access to course settings.

Stored Cross site scripting (XSS) vulnerability in Classroomio LMS 0.1.13 allows authenticated attackers to execute arbitrary code via crafted SVG profile pictures.

An Insecure Direct Object Reference (IDOR) in classroomio 0.1.13 allows students to access sensitive admin/teacher endpoints by manipulating course IDs in URLs, resulting in unauthorized disclosure of sensitive course, admin, and student data. The leak occurs momentarily before the system reverts to a normal state restricting access.

Stored Cross site scripting (XSS) vulnerability in Classroomio LMS 0.1.13 allows authenticated attackers to execute arbitrary code via crafted SVG cover images.

An issue was discovered in classroomio 0.1.13. Student accounts are able to delete courses from the Explore page without any authorization or authentication checks, bypassing the expected admin-only deletion restriction.