CVE-2026-111368ClassroomIO through 1.0.0 IDOR via Course Submission Update, Grade and Delete Routes
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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ClassroomIO through 1.0.0 contains an insecure direct object reference vulnerability in the Hono API course submission routes that allows course tutors or admins to modify submissions in other courses. Attackers can supply their own course id with another course's submission UUID to PUT or DELETE handlers to overwrite answers, grades, feedback, and grading status or delete submissions.
- CVSS
- 6.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
classroomio ClassroomIO classroomio:classroomio (from the name) | through 1.0.0 | CNA record |
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/submission.tstechnical-description
- https://github.com/classroomio/classroomio/blob/v1.0.0/packages/db/src/queries/submission/submission.ts#L217-L245technical-description
- https://github.com/classroomio/classroomio/commit/1844ad9671a0d9c2566d3431d82f34d39016242cpatch
- https://github.com/classroomio/classroomioproduct
- https://www.vulncheck.com/advisories/classroomio-through-1.0.0-idor-via-course-submission-update-grade-and-delete-routesthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.