CVE-2026-111369
CVE-2026-111369 · ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routes
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.1 · High · EPSS 0.2%
- Published
- Updated
Affected products and versions
classroomio
- Versions
- ≥ 0, ≤ 1.0.0: Affected (semver)
No fix published
Original sources
- https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor
- https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/lesson.ts#L107-L152
- https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/middlewares/course-member.ts
- https://github.com/classroomio/classroomio
- https://www.vulncheck.com/advisories/classroomio-through-1.0.0-incorrect-authorization-via-lesson-update-and-delete-routes
- https://nvd.nist.gov/vuln/detail/CVE-2026-111369