CVE-2026-111368
MediumCVSS 6.4Summary
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.
Risk Assessment
Users with tutor or admin privileges can modify or delete submission data in courses they are not authorized for, leading to data integrity violations and academic fraud.
Recommendation
Update ClassroomIO to a version later than 1.0.0 if available and enforce server-side authorization checks for submission operations.
Other vulnerabilities in ClassroomIO
See all- CVE-2026-111369High
ClassroomIO through 1.0.0 contains an incorrect authorization vulnerability in the PUT and DELETE /:lessonId 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.
- CVE-2025-65669Critical
In classroomio 0.1.13, student accounts can delete courses from the Explore page without any authorization or authentication checks, bypassing the expected admin-only deletion restriction.
- CVE-2025-65670Medium
An IDOR vulnerability in classroomio 0.1.13 allows students to access sensitive admin/teacher endpoints by manipulating course IDs in URLs, resulting in temporary unauthorized disclosure of sensitive course, admin, and student data before the system reverts to normal access restrictions.
- CVE-2025-65672High
An Insecure Direct Object Reference (IDOR) vulnerability in classroomio 0.1.13 allows unauthorized access to share and invite features in course settings.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS