CVE-2026-124551

MediumCVSS 5.3/10Last modified Nov 12, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-639

Affected software

Vendor	Product	Versions
classroomio	classroomio	<= 1.0.0

References

Timeline

Published: Nov 8, 2026
Last modified: Nov 12, 2026
NVD status: Deferred

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