Overview
This blog post details a significant security vulnerability, identified as CVE-2025-65670, affecting Classroomio version 0.1.13. This vulnerability is an Insecure Direct Object Reference (IDOR) that allows unauthorized access to sensitive administrative and student data.
Technical Details
CVE-2025-65670 is an IDOR (Insecure Direct Object Reference) vulnerability. In Classroomio 0.1.13, students can manipulate course IDs within URLs to access admin/teacher-restricted endpoints. This allows them to view sensitive information related to courses, administrators, and other students. The exploit leverages the application’s failure to properly validate user authorization when accessing resources via direct object references. It is reported that the leak occurs briefly before access rights are reset, although unauthorized data exposure still happens.
CVSS Analysis
Unfortunately, a CVSS score and severity rating are currently not available (N/A) for CVE-2025-65670 at the time of this writing. However, given the nature of the vulnerability, allowing unauthorized access to sensitive data, it is likely to be classified as high severity once a CVSS score is assigned. We strongly recommend that Classroomio users apply the necessary mitigations immediately.
Possible Impact
The potential impact of CVE-2025-65670 is significant. Successful exploitation can lead to:
- Unauthorized Data Disclosure: Students can access sensitive information about courses, other students, and administrators.
- Privacy Violations: Exposure of personally identifiable information (PII) can result in privacy breaches.
- Data Manipulation (Potential): Depending on the specific endpoints accessible, the vulnerability could potentially allow for data modification, leading to further security compromises.
- System Compromise: Escalation of privileges and complete system takeover.
Mitigation and Patch Steps
To address CVE-2025-65670, the following steps are recommended:
- Upgrade Classroomio: The primary mitigation is to upgrade to a patched version of Classroomio that addresses the IDOR vulnerability. Check the official Classroomio website for updates and security advisories.
- Implement Proper Authorization Checks: Ensure that all endpoints accessing sensitive data enforce strict authorization checks, verifying that the user has the necessary permissions to access the requested resource.
- Input Validation: Implement robust input validation to prevent manipulation of course IDs or other parameters in URLs.
- Regular Security Audits: Conduct regular security audits and penetration testing to identify and address potential vulnerabilities in your Classroomio deployment.
