CVE-2023-41506
📋 TL;DR
This vulnerability allows attackers to upload arbitrary PHP files through the student profile picture upload function in Student Enrollment In PHP v1.0. Successful exploitation enables remote code execution on the web server. All deployments of this specific software version are affected.
💻 Affected Systems
- Student Enrollment In PHP
📦 What is this software?
Student Enrollment by Code Projects
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise leading to data theft, ransomware deployment, or use as a foothold for lateral movement within the network.
Likely Case
Webshell installation allowing persistent access, data exfiltration, and further exploitation of the server and connected systems.
If Mitigated
File uploads are blocked or properly validated, preventing malicious file execution while maintaining legitimate functionality.
🎯 Exploit Status
Exploitation requires access to the student profile update function; public proof-of-concept code exists in GitHub repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Consider replacing with alternative software or implementing strict file upload validation.
🔧 Temporary Workarounds
Implement File Upload Validation
allAdd server-side validation to restrict uploaded files to allowed extensions (jpg, png, gif) and verify file content type.
Modify PHP upload handler to check file extension and MIME type before saving
Disable Profile Picture Upload
allTemporarily disable the vulnerable upload function until proper fixes can be implemented.
Comment out or remove profile picture upload code in relevant PHP files
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block PHP file uploads
- Restrict network access to the application using firewall rules
🔍 How to Verify
Check if Vulnerable:
Attempt to upload a PHP file through the student profile picture upload function. If it accepts and saves the file, the system is vulnerable.Check Version:
Check application version in admin panel or source code filesVerify Fix Applied:
Test that PHP files are rejected during upload and only allowed image formats are accepted.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with .php extension
- Multiple failed upload attempts
- Access to unexpected PHP files in upload directories
Network Indicators:
- POST requests to upload endpoints with PHP file content
- Subsequent requests to uploaded PHP files
SIEM Query:
source="web_logs" AND (uri="*upload*" OR uri="*.php") AND method="POST"