CVE-2025-54944
📋 TL;DR
This vulnerability allows remote attackers to upload malicious files to SUNNET Corporate Training Management System, potentially leading to arbitrary code execution. It affects all systems running versions before 10.11. Attackers can exploit this without authentication to compromise the server.
💻 Affected Systems
- SUNNET Corporate Training Management System
📦 What is this software?
Ehrd Ctms by Sun.net
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with full remote code execution, data theft, and persistent backdoor installation.
Likely Case
Webshell deployment leading to data exfiltration, lateral movement, and ransomware deployment.
If Mitigated
Limited impact with proper file upload restrictions and web application firewalls in place.
🎯 Exploit Status
Unrestricted file upload vulnerabilities are commonly exploited with simple tools like curl or web proxies.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.11
Vendor Advisory: https://zuso.ai/advisory/za-2025-12
Restart Required: Yes
Instructions:
1. Backup current installation and data. 2. Download version 10.11 from official vendor source. 3. Follow vendor upgrade documentation. 4. Restart application services. 5. Verify functionality.
🔧 Temporary Workarounds
Web Application Firewall Rule
allBlock uploads of dangerous file types at the WAF level
# Example WAF rule to block dangerous extensions
# Add to WAF configuration:
# deny if request_uri contains ".php" and request_method = "POST"
# deny if request_uri contains ".jsp" and request_method = "POST"
# deny if request_uri contains ".asp" and request_method = "POST"
File Upload Directory Restriction
linuxConfigure web server to prevent execution in upload directories
# Apache: Add to .htaccess in upload directory
<FilesMatch "\.(php|jsp|asp|aspx|pl|py|cgi)">
Order Deny,Allow
Deny from all
</FilesMatch>
# Nginx: Add to server block
location /uploads/ {
deny all;
return 403;
}
🧯 If You Can't Patch
- Disable file upload functionality completely in application configuration
- Implement strict file type validation and store uploaded files outside web root
🔍 How to Verify
Check if Vulnerable:
Check application version in admin panel or configuration files. If version is below 10.11, system is vulnerable.Check Version:
# Check version in application interface or configuration files
# No universal command - check admin panel or config.php filesVerify Fix Applied:
After patching, attempt to upload a test file with dangerous extension (.php, .jsp, etc.) - should be rejected.📡 Detection & Monitoring
Log Indicators:
- Multiple failed upload attempts with executable extensions
- Successful uploads of .php, .jsp, .asp files
- Unusual POST requests to upload endpoints
Network Indicators:
- POST requests to upload endpoints with executable file content
- Subsequent requests to uploaded executable files
SIEM Query:
source="web_logs" AND (uri="*upload*" OR uri="*file*" OR method="POST") AND (extension=".php" OR extension=".jsp" OR extension=".asp" OR extension=".aspx")