CVE-2025-12270
📋 TL;DR
This vulnerability in LearnHouse allows attackers to manipulate resource identifiers in the student assignment submission API, potentially accessing unauthorized files or data. It affects LearnHouse instances with the vulnerable code commit up to 98dfad76aad70711a8113f6c1fdabfccf10509ca. Remote attackers can exploit this without authentication.
💻 Affected Systems
- LearnHouse
📦 What is this software?
Learnhouse by Learnhouse
⚠️ Risk & Real-World Impact
Worst Case
Unauthorized access to sensitive student assignment files, grade manipulation, or data exfiltration from the LearnHouse system.
Likely Case
Access to other students' assignment submissions or limited system files through path traversal or ID manipulation.
If Mitigated
Minimal impact with proper input validation and access controls preventing unauthorized resource access.
🎯 Exploit Status
Exploit details are publicly available in GitHub gist. Attack can be initiated remotely without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: UNKNOWN
Vendor Advisory: NONE
Restart Required: No
Instructions:
No official patch available. Vendor was contacted but did not respond. Consider workarounds or alternative solutions.
🔧 Temporary Workarounds
API Endpoint Restriction
allRestrict access to the vulnerable /api/v1/assignments/{assignment_id}/tasks/{task_id}/sub_file endpoint using web application firewall or reverse proxy rules.
# Example nginx location block to block the endpoint
location ~ ^/api/v1/assignments/.*/tasks/.*/sub_file$ {
deny all;
return 403;
}
Input Validation Enhancement
allImplement strict validation of assignment_id and task_id parameters to prevent ID manipulation attacks.
# Example validation logic (pseudocode)
if (!is_valid_uuid(assignment_id) || !is_valid_uuid(task_id)) {
return error_response('Invalid parameters');
}
🧯 If You Can't Patch
- Implement network segmentation to isolate LearnHouse from sensitive systems.
- Enable detailed logging and monitoring of all API requests to the vulnerable endpoint.
🔍 How to Verify
Check if Vulnerable:
Check if your LearnHouse instance includes commit 98dfad76aad70711a8113f6c1fdabfccf10509ca or earlier in its git history. Test the API endpoint with manipulated IDs to see if unauthorized access is possible.Check Version:
git log --oneline -1 # Check latest commit hash in LearnHouse installation directoryVerify Fix Applied:
Verify that ID manipulation attempts at /api/v1/assignments/{assignment_id}/tasks/{task_id}/sub_file return proper authorization errors and cannot access unauthorized resources.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authorization attempts on assignment submission API
- Unusual patterns in assignment_id or task_id parameters (non-UUID formats, sequential IDs)
Network Indicators:
- Unusual traffic patterns to /api/v1/assignments/*/tasks/*/sub_file endpoint
- Requests with manipulated ID parameters
SIEM Query:
source="learnhouse.logs" AND uri_path="/api/v1/assignments/*/tasks/*/sub_file" AND (http_status=200 OR http_status=403) | stats count by src_ip, uri_path