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How the CVE Works:
This vulnerability is an Insecure Direct Object Reference (IDOR) within the classroomio application version 0.1.13. The application’s access control mechanisms fail to properly validate a user’s authorization level when processing requests for course management functions. Specifically, API endpoints responsible for sharing courses or generating/managing invitation links do not verify if the requesting user is the legitimate owner or an administrator of the targeted course. By manipulating direct object references, such as the `course_id` or `invite_code` parameters in HTTP requests, an authenticated attacker can exploit this flawed logic. They can send crafted requests to endpoints like `/api/course/share` or `/api/invite/access` to gain unauthorized read or write access to course settings, modify details, or invite arbitrary users without possessing the required privileges. The system incorrectly assumes that possession of a valid session token is sufficient for all actions, bypassing necessary checks against the user’s role within the specific course object.
DailyCVE Form:
Platform: classroomio
Version: 0.1.13
Vulnerability: IDOR
Severity: Critical
Date: 11/26/2025
Prediction: 12/15/2025
What Undercode Say:
Analytics:
grep -r "course/share|invite/access" routes/
curl -H "Authorization: Bearer $TOKEN" "https://target/api/course/$COURSE_ID/share" -X POST
for id in {1..100}; do curl -s -o /dev/null -w "%{http_code}" https://target/api/course/$id/settings; done
How Exploit:
1. Attacker logs in with a low-privilege account.
- Intercepts or guesses a valid course ID or invite code.
- Sends a POST request to the vulnerable endpoint with the guessed identifier.
POST /api/course/456/invite HTTP/1.1 Authorization: Bearer <ATTACKER_TOKEN> Content-Type: application/json {"invite_email":"[email protected]"}
4. Gains unauthorized administrative access to the course.
Protection from this CVE:
Implement proper authorization checks.
Validate user against object ownership.
Use indirect reference maps.
Impact:
Unauthorized course modification.
Data breach potential.
Privilege escalation.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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