CVE-2025-15503
📋 TL;DR
CVE-2025-15503 is an unrestricted file upload vulnerability in Sangfor Operation and Maintenance Management System that allows remote attackers to upload arbitrary files to the server. This affects all versions up to 3.0.8 of the system. Successful exploitation could lead to remote code execution or system compromise.
💻 Affected Systems
- Sangfor Operation and Maintenance Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through remote code execution, data theft, lateral movement within the network, and persistent backdoor installation.
Likely Case
Webshell upload leading to unauthorized access, data exfiltration, and potential privilege escalation on the affected server.
If Mitigated
File upload attempts blocked at the web application firewall level, preventing successful exploitation while maintaining system functionality.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making this easily weaponizable by attackers with minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: No
Instructions:
No official patch available. Consider upgrading to any version above 3.0.8 if released by vendor, or implement workarounds.
🔧 Temporary Workarounds
Block vulnerable endpoint
allBlock access to the vulnerable /fort/trust/version/common/common.jsp endpoint at the web server or firewall level
# Apache: RewriteRule ^/fort/trust/version/common/common\.jsp$ - [F,L]
# Nginx: location ~ ^/fort/trust/version/common/common\.jsp$ { return 403; }
Implement file upload restrictions
allConfigure web application firewall to block file uploads to the vulnerable endpoint and restrict allowed file types
# WAF specific rules vary by vendor
🧯 If You Can't Patch
- Isolate affected systems in a separate network segment with strict access controls
- Implement network monitoring and intrusion detection specifically for file upload attempts to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Attempt to access https://[target]/fort/trust/version/common/common.jsp?File=test.txt and check if file upload functionality existsCheck Version:
Check system documentation or web interface for version information; Sangfor O&M Management System typically displays version in admin interfaceVerify Fix Applied:
Verify that file upload attempts to the vulnerable endpoint are blocked or return appropriate error responses📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /fort/trust/version/common/common.jsp with File parameter
- Unusual file upload activity in web server logs
- Webshell creation in web directories
Network Indicators:
- POST requests to vulnerable endpoint with file upload content
- Unusual outbound connections from web server following upload attempts
SIEM Query:
source="web_server" AND (uri="/fort/trust/version/common/common.jsp" OR uri CONTAINS "common.jsp") AND (method="POST" OR params CONTAINS "File=")