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.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sun, 08 Nov 2026 14:00:00 +0000

Type Values Removed Values Added
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.
Title ClassroomIO through 1.0.0 Cross-Organization Course Disclosure via Clone Endpoint
First Time appeared Classroomio
Classroomio classroomio
Weaknesses CWE-639
CPEs cpe:2.3:a:classroomio:classroomio:*:*:*:*:*:*:*:*
Vendors & Products Classroomio
Classroomio classroomio
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-08T13:52:34.322Z

Reserved: 2026-11-08T13:43:23.426Z

Link: CVE-2026-124551

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-08T14:18:19.417

Modified: 2026-11-08T14:18:19.547

Link: CVE-2026-124551

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-08T15:30:16Z

Weaknesses