CVE-2026-111369

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 v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/classroomio/classroomio
https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/middlewares/course-member.ts
https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/lesson.ts#L107-L152
https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor
https://www.vulncheck.com/advisories/classroomio-through-1.0.0-incorrect-authorization-via-lesson-update-and-delete-routes

Configurations

No configuration.

History

15 Oct 2026, 22:19

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-15 22:19

Updated : 2026-10-16 18:25

NVD link : CVE-2026-111369

Mitre link : CVE-2026-111369

CVE.ORG link : CVE-2026-111369

JSON object : View

Products Affected

No product.

CWE

CWE-863

Incorrect Authorization

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