CVE-2023-5601
📋 TL;DR
This vulnerability allows unauthenticated attackers to upload arbitrary files to WordPress servers running the vulnerable WooCommerce Ninja Forms Product Add-ons plugin. This can lead to remote code execution (RCE), potentially giving attackers full control over affected websites. All WordPress sites using this plugin before version 1.7.1 are affected.
💻 Affected Systems
- WooCommerce Ninja Forms Product Add-ons WordPress plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise with attackers gaining persistent access, installing malware, stealing sensitive data, and using the server for further attacks.
Likely Case
Website defacement, data theft, cryptocurrency mining, or ransomware deployment on vulnerable WordPress installations.
If Mitigated
Limited impact if file uploads are restricted at web server level or if intrusion detection systems block malicious upload attempts.
🎯 Exploit Status
Simple file upload vulnerability with no authentication required, making exploitation trivial for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.7.1
Vendor Advisory: https://wpscan.com/vulnerability/0035ec5e-d405-4eb7-8fe4-29dd0c71e4bc
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'WooCommerce Ninja Forms Product Add-ons'. 4. Update to version 1.7.1 or later. 5. Verify update completed successfully.
🔧 Temporary Workarounds
Disable plugin
allTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate woocommerce-ninja-forms-product-addons
Restrict file uploads
allConfigure web server to block file uploads to the vulnerable endpoint
# Add to .htaccess for Apache:
<LocationMatch "\/wp-content\/plugins\/woocommerce-ninja-forms-product-addons\/.*">
Deny from all
</LocationMatch>
# Add to nginx config:
location ~ /wp-content/plugins/woocommerce-ninja-forms-product-addons/ {
deny all;
}
🧯 If You Can't Patch
- Immediately disable the WooCommerce Ninja Forms Product Add-ons plugin
- Implement web application firewall (WAF) rules to block file uploads to the vulnerable endpoint
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'WooCommerce Ninja Forms Product Add-ons' versionCheck Version:
wp plugin get woocommerce-ninja-forms-product-addons --field=versionVerify Fix Applied:
Verify plugin version shows 1.7.1 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to /wp-content/plugins/woocommerce-ninja-forms-product-addons/
- POST requests to plugin upload endpoints from unauthenticated users
- Execution of suspicious PHP files in upload directories
Network Indicators:
- HTTP POST requests to paths containing 'woocommerce-ninja-forms-product-addons' with file uploads
- Unusual outbound connections from web server after file uploads
SIEM Query:
source="web_server_logs" AND (uri="/wp-content/plugins/woocommerce-ninja-forms-product-addons/*" AND method="POST" AND status=200)