CVE-2023-53871
📋 TL;DR
Soosyze 2.0.0 contains an unrestricted file upload vulnerability that allows attackers to upload HTML files containing PHP code. This enables remote code execution on the server, potentially compromising the entire system. All users running Soosyze 2.0.0 are affected.
💻 Affected Systems
- Soosyze
📦 What is this software?
Soosyze by Soosyze
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, ransomware deployment, or use as a foothold for lateral movement in the network.
Likely Case
Webshell installation allowing persistent backdoor access, data exfiltration, and further exploitation of the server.
If Mitigated
File uploads blocked or properly validated, preventing malicious file execution while maintaining legitimate functionality.
🎯 Exploit Status
Exploit code is publicly available on Exploit-DB (ID 51718), making this trivial to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://soosyze.com/
Restart Required: No
Instructions:
No official patch available. Check Soosyze website for updates. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Restrict File Upload Extensions
allConfigure web server or application to block uploads of .html and .php files
# Apache: Add to .htaccess
<FilesMatch "\.(php|html|htm)$">
Order Allow,Deny
Deny from all
</FilesMatch>
# Nginx: Add to server block
location ~ \.(php|html|htm)$ {
deny all;
}
Implement File Type Validation
allAdd server-side validation to check file content type, not just extension
# PHP example validation
$allowed_types = ['image/jpeg', 'image/png'];
if (!in_array($_FILES['file']['type'], $allowed_types)) {
die('Invalid file type');
}
🧯 If You Can't Patch
- Immediately disable file upload functionality in Soosyze configuration
- Implement WAF rules to block file uploads containing PHP code patterns
🔍 How to Verify
Check if Vulnerable:
Check if running Soosyze 2.0.0 by examining version files or admin panel. Test if you can upload an HTML file containing PHP code (<?php phpinfo(); ?>) and access it.Check Version:
# Check Soosyze version
cat /path/to/soosyze/VERSION
# Or check composer.json
cat /path/to/soosyze/composer.json | grep versionVerify Fix Applied:
Attempt to upload a test HTML file with PHP code. If upload is blocked or file cannot be executed, the fix is working.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to upload directories
- Access to .html files in upload directories with suspicious patterns
- PHP execution from non-PHP files
Network Indicators:
- POST requests to file upload endpoints with HTML/PHP content
- Subsequent GET requests to uploaded .html files
SIEM Query:
source="web_server_logs" (POST /upload OR POST /file-upload) AND (file="*.html" OR file="*.htm")