CVE-2025-57633
📋 TL;DR
This CVE describes a critical command injection vulnerability in FTP-Flask-python that allows unauthenticated remote attackers to execute arbitrary operating system commands. The vulnerability exists in the /ftp.html endpoint's file upload functionality, which directly passes user input to os.system() without sanitization. Any system running the vulnerable FTP-Flask-python application is affected.
💻 Affected Systems
- FTP-Flask-python
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to data theft, ransomware deployment, lateral movement across networks, and persistent backdoor installation.
Likely Case
Remote code execution leading to web server compromise, data exfiltration, and potential pivot to internal network resources.
If Mitigated
Limited impact with proper network segmentation, minimal privileges, and input validation in place.
🎯 Exploit Status
The exploit requires no authentication and minimal technical skill to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch exists. Remove or replace the vulnerable application with a secure alternative.
🔧 Temporary Workarounds
Disable FTP Upload Endpoint
allRemove or disable the /ftp.html endpoint to prevent exploitation.
# Edit ftp_app.py to remove or comment out the vulnerable route
Implement Input Validation
allAdd proper input sanitization to the ftp_file parameter before passing to os.system().
# Replace os.system() with subprocess.run() using proper escaping
🧯 If You Can't Patch
- Network segmentation: Isolate the vulnerable system from critical assets
- Implement strict firewall rules to limit access to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Check if the application uses FTP-Flask-python commit 5173b68 or earlier and has the /ftp.html endpoint accessible.Check Version:
git log --oneline -1Verify Fix Applied:
Verify that the vulnerable endpoint is no longer accessible or that input validation has been implemented.📡 Detection & Monitoring
Log Indicators:
- Unusual commands in system logs originating from the Flask application
- Multiple failed or suspicious upload attempts to /ftp.html
Network Indicators:
- HTTP POST requests to /ftp.html with shell metacharacters in parameters
- Outbound connections from the web server to unexpected destinations
SIEM Query:
source="web_logs" AND uri_path="/ftp.html" AND (method="POST" OR params CONTAINS "|" OR params CONTAINS ";" OR params CONTAINS "`" OR params CONTAINS "$")