CVE-2026-124551 | BDVDB-2026-402050 Detail
classroomioclassroomio
Description#
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact none, availability impact none. Attack vector: network.
Weaknesses#
- CWE-639 Authorization Bypass Through User-Controlled Key
References#
- https://github.com/classroomio/classroomio/issues/1414
- https://github.com/classroomio/classroomio
- https://github.com/classroomio/classroomio/commit/6630b73f8d53e316de6f575a170b093da6bf3cca
- https://hackmd.io/@hieuPenguinnn/classroomio-course-clone-cross-org-content-exfiltration
- https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/course.ts#L584-L612
- https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/services/course/clone.ts#L202-L290
- https://www.vulncheck.com/advisories/classroomio-through-1.0.0-cross-organization-course-disclosure-via-clone-endpoint
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.