Vulnerability in ClassroomIO

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/classroomio/classroomio
• github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/middlewares/course-member.ts
• github.com/classroomio/classroomio/blob/v1.0.0/apps/api/src/routes/course/lesson.ts
• hackmd.io/@hieuPenguinnn/classroomio-course-resource-id-scoping-idor
• www.vulncheck.com/advisories/classroomio-through-1.0.0-incorrect-authorization-via-less…