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How CVE-2025-65670 Works:
The Insecure Direct Object Reference (IDOR) vulnerability in classroomio 0.1.13 arises from insufficient server-side authorization checks on endpoints that handle course IDs. When students access course-related URLs, the application directly uses course ID parameters from HTTP requests without verifying if the user has appropriate permissions for that specific course. By manipulating the course ID value in URLs or API requests, a student can reach admin or teacher endpoints intended for higher-privileged users. For instance, changing a course ID from 123 to 456 in a GET request to `/api/courses/{id}/admin` may grant access to sensitive data for course 456. The system momentarily processes the request, returning sensitive course details, admin information, and student records in the response before reverting to a normal state that restricts access. This transient leak occurs because the application validates user roles but neglects object-level authorization, trusting client-provided identifiers. The vulnerability is exploitable through simple parameter tampering using browser developer tools or command-line utilities like curl, allowing unauthorized data disclosure without advanced skills. The exposure window is brief, but during that time, data is fully accessible, posing a significant security risk.
Platform: classroomio
Version: 0.1.13
Vulnerability: Insecure Direct Object Reference
Severity: High
Date: 11/26/2025
Prediction: Patch not available
What Undercode Say:
curl -s "https://target.com/api/courses/1/admin" -H "Cookie: session=student_token"
for id in {1..100}; do curl -s "https://target.com/api/courses/$id/admin" -H "Cookie: session=student_token" | grep -l "admin_data" && echo "ID $id exposed"; done
how Exploit:
Modify course ID parameters in URLs or API requests while authenticated as a student to access admin endpoints and retrieve sensitive data.
Protection from this CVE:
Implement server-side access controls validating user permissions per object, use indirect references instead of direct IDs, and conduct security audits.
Impact:
Unauthorized sensitive data disclosure, privacy breaches, compliance violations, and trust loss.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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