CVE-2025-7114
📋 TL;DR
This critical vulnerability in SimStudioAI allows unauthenticated remote attackers to bypass authentication and upload files via the session handler API. It affects all SimStudioAI installations up to commit 37786d371e17d35e0764e1b5cd519d873d90d97b, potentially enabling unauthorized file uploads and system compromise.
💻 Affected Systems
- SimStudioAI
📦 What is this software?
Sim by Sim
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system takeover, data exfiltration, or deployment of ransomware across affected systems.
Likely Case
Unauthorized file uploads allowing attackers to upload malicious files, deface websites, or establish persistence for further attacks.
If Mitigated
Limited impact with proper network segmentation and authentication controls in place, potentially only affecting isolated components.
🎯 Exploit Status
Exploit has been publicly disclosed and requires minimal technical skill to execute due to missing authentication checks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - vendor has not responded to disclosure
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Monitor the SimStudioAI repository for updates or consider alternative solutions.
🔧 Temporary Workarounds
Implement API Authentication
allAdd authentication middleware to the /api/files/upload endpoint to require valid credentials
// Add authentication check in apps/sim/app/api/files/upload/route.ts
// Example: if (!req.session.user) return new Response('Unauthorized', { status: 401 })
Network Access Control
linuxRestrict access to the upload endpoint using firewall rules or network segmentation
# Example iptables rule to restrict upload endpoint
# iptables -A INPUT -p tcp --dport [APP_PORT] -m string --string "/api/files/upload" --algo bm -j DROP
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with rules to block unauthenticated upload requests
- Disable or remove the vulnerable file upload functionality entirely if not required
🔍 How to Verify
Check if Vulnerable:
Check if your SimStudioAI version includes commit 37786d371e17d35e0764e1b5cd519d873d90d97b or earlier in the git historyCheck Version:
git log --oneline -1Verify Fix Applied:
Test the /api/files/upload endpoint without authentication; it should return 401 Unauthorized or be inaccessible📡 Detection & Monitoring
Log Indicators:
- Unauthenticated POST requests to /api/files/upload
- File uploads from unexpected IP addresses
- 401 status codes missing for upload attempts
Network Indicators:
- Unusual file upload traffic patterns
- POST requests to upload endpoint without preceding authentication requests
SIEM Query:
source="web_server" AND (uri_path="/api/files/upload" AND http_method="POST" AND NOT (user_agent="*bot*" OR user="authenticated_user"))