CVE-2026-111368 Details
Description
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.
A vulnerability allowing insecure direct object reference (IDOR) has been identified in ClassroomIO versions through 1.0.0. This vulnerability exists within the Hono API course submission routes, where course tutors or admins can manipulate submissions across different courses. By supplying a custom course ID along with another course's submission UUID, it is possible to use the PUT or DELETE handlers to overwrite answers, grades, feedback, and grading status, or to delete submissions entirely.
Users can be enrolled as course tutors or cohort mentors to gain the necessary permissions. This can be done through the ClassroomIO interface or by contacting an administrator.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 15, 2026CISA-ADP
Assessed Oct 16, 2026References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-639 | Authorization Bypass Through User-Controlled Key | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| ClassroomIO | <= 1.0.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 16, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |