CVE-2026-111369
ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routes
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 15, 2026
- Updated
- Oct 16, 2026
- Reserved
- Oct 15, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.1 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L | VulnCheck |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
ClassroomIOclassroomio |
|
References
- https://hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idorthird-party-advisory
- https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/lesson.ts#L107-L152technical-description
- https://github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/middlewares/course-member.tstechnical-description
- https://github.com/classroomio/classroomioproduct
- VulnCheck Advisory: ClassroomIO through 1.0.0 Incorrect Authorization via Lesson Update and Delete Routesthird-party-advisory
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