CVE-2022-30820
📋 TL;DR
CVE-2022-30820 is an arbitrary file upload vulnerability in Wedding Management v1.0 that allows attackers to upload malicious files through the picture upload functionality in users_edit.php. This can lead to remote code execution on the web server. All users running the vulnerable version of Wedding Management v1.0 are affected.
💻 Affected Systems
- Wedding Management System
📦 What is this software?
Wedding Management System by Wedding Management System Project
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through remote code execution, allowing attackers to execute arbitrary commands, steal data, install malware, or pivot to other systems.
Likely Case
Webshell deployment leading to data theft, defacement, or use as a foothold for further attacks within the network.
If Mitigated
File uploads restricted to authenticated users only, with attackers unable to execute uploaded files due to proper file type validation and storage outside web root.
🎯 Exploit Status
Exploitation requires authentication to access the users_edit.php functionality. The GitHub reference shows detailed exploitation steps.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
Implement file upload validation
allAdd server-side validation to restrict uploaded files to specific extensions (e.g., .jpg, .png) and verify file content type.
Modify users_edit.php to include: $allowed_extensions = ['jpg', 'jpeg', 'png', 'gif']; $file_extension = strtolower(pathinfo($_FILES['picture']['name'], PATHINFO_EXTENSION)); if (!in_array($file_extension, $allowed_extensions)) { die('Invalid file type'); }
Store uploaded files outside web root
allMove uploaded files to a directory not accessible via web URL, and serve them through a secure script.
Change upload directory from web-accessible location to outside document root, e.g., /var/uploads/ instead of /var/www/html/uploads/
🧯 If You Can't Patch
- Disable the picture upload functionality in users_edit.php by commenting out or removing the upload code.
- Implement a web application firewall (WAF) with rules to block malicious file uploads and monitor for exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Check if Wedding Management v1.0 is installed and if users_edit.php allows uploading files without proper validation. Test by attempting to upload a file with a .php extension.Check Version:
Check the software version in the admin panel or configuration files; look for version 1.0 in source code or documentation.Verify Fix Applied:
After applying workarounds, test that only allowed file types (e.g., .jpg) can be uploaded and that uploaded files cannot be executed as code.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to users_edit.php, especially with non-image extensions like .php, .exe, or .sh
- HTTP POST requests to users_edit.php with large or suspicious file payloads
Network Indicators:
- Traffic spikes to users_edit.php endpoint, followed by requests to uploaded malicious files
SIEM Query:
source="web_logs" AND uri="/users_edit.php" AND method="POST" AND (file_extension="php" OR file_extension="exe" OR file_extension="sh")