CVE-2021-25206
📋 TL;DR
This vulnerability allows attackers to upload arbitrary files to the Responsive Ordering System v1.0 via Product_model.php, potentially leading to remote code execution. Any organization using this specific version of the software is affected. The high CVSS score indicates critical severity.
💻 Affected Systems
- SourceCodester Responsive Ordering System
📦 What is this software?
Responsive Ordering System by Responsive Ordering System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the web server, data exfiltration, and lateral movement to other systems.
Likely Case
Webshell deployment leading to data theft, defacement, or use as a foothold for further attacks.
If Mitigated
File upload blocked or sanitized, preventing malicious file execution while maintaining normal functionality.
🎯 Exploit Status
Exploitation requires authentication to access the vulnerable endpoint
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch exists. Consider migrating to alternative software or implementing workarounds.
🔧 Temporary Workarounds
File Upload Restriction
allImplement strict file type validation and extension filtering for uploads
Modify Product_model.php to validate file extensions and MIME types
Web Application Firewall
allDeploy WAF rules to block malicious file upload patterns
Configure WAF to block requests with suspicious file extensions or content
🧯 If You Can't Patch
- Isolate the system in a restricted network segment
- Implement strict access controls and monitor all file upload activities
🔍 How to Verify
Check if Vulnerable:
Check if running Responsive Ordering System v1.0 and test file upload functionality with malicious extensionsCheck Version:
Check application files or documentation for version informationVerify Fix Applied:
Test file upload with restricted extensions and verify they are rejected📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to Product_model.php
- Files with executable extensions in upload directories
Network Indicators:
- HTTP POST requests to Product_model.php with file uploads
- Subsequent requests to uploaded files
SIEM Query:
source="web_logs" AND uri="/Product_model.php" AND method="POST" AND file_extension IN ("php", "jsp", "asp")