CVE-2025-8255
📋 TL;DR
This critical vulnerability in Exam Form Submission 1.0 allows remote attackers to upload arbitrary files via the /register.php endpoint. Attackers can potentially execute malicious code on the server by uploading files with dangerous extensions. All systems running this software with the vulnerable /register.php endpoint accessible are affected.
💻 Affected Systems
- code-projects Exam Form Submission
📦 What is this software?
Exam Form Submission by Code Projects
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through remote code execution, data theft, and persistent backdoor installation.
Likely Case
Webshell deployment leading to unauthorized access, data exfiltration, and lateral movement within the network.
If Mitigated
File upload attempts blocked or quarantined with no successful exploitation.
🎯 Exploit Status
Public exploit available on GitHub. Simple file upload manipulation required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://code-projects.org/
Restart Required: No
Instructions:
No official patch available. Consider removing or replacing the software.
🔧 Temporary Workarounds
Block /register.php Access
allRestrict access to the vulnerable endpoint using web server configuration
# Apache: <Location /register.php> Require all denied </Location>
# Nginx: location /register.php { deny all; }
Implement File Upload Restrictions
allAdd server-side validation for file uploads including extension whitelisting and content checking
# Add to PHP configuration or application code
# Example: $allowed_extensions = ['jpg', 'png', 'gif'];
# Implement mime-type verification and file size limits
🧯 If You Can't Patch
- Isolate the system in a DMZ with strict network segmentation
- Implement WAF rules to block malicious file upload patterns
🔍 How to Verify
Check if Vulnerable:
Check if /register.php exists and accepts file uploads without proper validation. Attempt to upload a test file with dangerous extension.Check Version:
Check application files or documentation for version information. Typically found in README or configuration files.Verify Fix Applied:
Test that file uploads are properly validated and restricted. Verify /register.php endpoint is blocked or removed.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /register.php
- Files with suspicious extensions (.php, .exe, .sh) being uploaded
- Large number of upload attempts
Network Indicators:
- POST requests to /register.php with file uploads
- Unusual outbound connections after file uploads
SIEM Query:
source="web_server" AND (uri="/register.php" AND method="POST" AND content_type="multipart/form-data")