CVE-2025-65669
📋 TL;DR
CVE-2025-65669 is an authorization bypass vulnerability in classroomio 0.1.13 that allows student accounts to delete courses from the Explore page without proper permission checks. This bypasses the intended admin-only restriction, affecting all deployments running the vulnerable version where student accounts exist.
💻 Affected Systems
- classroomio
📦 What is this software?
Classroomio by Classroomio
⚠️ Risk & Real-World Impact
Worst Case
Malicious or compromised student accounts could delete all courses, causing complete disruption of educational activities and potential data loss.
Likely Case
Students accidentally or intentionally deleting courses they shouldn't have access to, leading to service disruption and administrative overhead.
If Mitigated
With proper authorization controls, only administrators can delete courses, maintaining system integrity.
🎯 Exploit Status
Exploitation requires student-level credentials but no special tools. The GitHub repository contains proof-of-concept details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: unknown
Vendor Advisory: unknown
Restart Required: No
Instructions:
1. Check the classroomio GitHub repository for security updates. 2. Upgrade to a patched version when available. 3. Review and test authorization controls after patching.
🔧 Temporary Workarounds
Disable course deletion for all users
allTemporarily remove course deletion functionality until a patch is available
Modify application code to comment out or disable course deletion endpoints
Implement web application firewall rules
allBlock DELETE requests to course endpoints from non-admin accounts
Configure WAF to block DELETE /api/courses/* for user roles != admin
🧯 If You Can't Patch
- Monitor course deletion logs and set up alerts for any deletions by non-admin accounts
- Implement manual approval workflow for course deletions or require multi-person authorization
🔍 How to Verify
Check if Vulnerable:
1. Log in as a student account. 2. Navigate to the Explore page. 3. Attempt to delete a course. If deletion succeeds without admin privileges, the system is vulnerable.Check Version:
Check package.json or application configuration for version numberVerify Fix Applied:
Repeat the vulnerable check steps - student accounts should receive an authorization error when attempting to delete courses.📡 Detection & Monitoring
Log Indicators:
- Course deletion events from non-admin user accounts
- DELETE requests to /api/courses/* from student roles
Network Indicators:
- HTTP DELETE requests to course endpoints from non-admin IPs
SIEM Query:
source="web_logs" AND (uri_path="/api/courses/*" AND http_method="DELETE" AND user_role!="admin")