CVE-2026-124551
5.3 MEDIUMpublic exploit availablePublished 2026-11-08 · Updated 2026-11-08
AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.
NVD 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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-639
Public exploit & PoC references
- https://github.com/classroomio/classroomio
- 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://github.com/classroomio/classroomio/commit/6630b73f8d53e316de6f575a170b093da6bf3cca
- https://github.com/classroomio/classroomio/issues/1414
All references
- https://github.com/classroomio/classroomio
- 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://github.com/classroomio/classroomio/commit/6630b73f8d53e316de6f575a170b093da6bf3cca
- https://github.com/classroomio/classroomio/issues/1414
- https://hackmd.io/@hieuPenguinnn/classroomio-course-clone-cross-org-content-exfiltration
- https://www.vulncheck.com/advisories/classroomio-through-1.0.0-cross-organization-course-disclosure-via-clone-endpoint
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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