CVE-2025-13231
📋 TL;DR
This vulnerability allows unauthenticated attackers to perform Server-Side Request Forgery (SSRF) attacks against WordPress sites using the Fancy Product Designer plugin. Attackers can exploit a timing gap between URL validation and file retrieval to redirect requests to internal or external systems. All WordPress sites with vulnerable plugin versions are affected.
💻 Affected Systems
- Fancy Product Designer WordPress Plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, exfiltrate sensitive data from internal networks, or use the vulnerable server as a proxy for attacks against other systems.
Likely Case
Attackers scanning for internal services, accessing metadata services (like AWS IMDS), or performing port scanning of internal networks.
If Mitigated
Limited impact if network segmentation restricts outbound connections and internal services are properly secured.
🎯 Exploit Status
Exploitation requires precise timing but tools exist to automate TOCTOU race conditions. No public exploit code found in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.4.9 or later
Vendor Advisory: https://support.fancyproductdesigner.com/support/discussions/topics/13000036024
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Fancy Product Designer. 4. Click 'Update Now' if available. 5. Alternatively, download version 6.4.9+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable vulnerable AJAX endpoint
allRemove or restrict access to the fpd_custom_uplod_file AJAX action
Add to theme's functions.php or custom plugin: add_filter('wp_ajax_nopriv_fpd_custom_uplod_file', '__return_false');
add_filter('wp_ajax_fpd_custom_uplod_file', '__return_false');
Web Application Firewall rule
allBlock requests to the vulnerable endpoint
WAF rule to block: POST requests containing 'action=fpd_custom_uplod_file'
🧯 If You Can't Patch
- Disable the Fancy Product Designer plugin completely
- Implement network-level restrictions to block outbound HTTP requests from the web server to internal networks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Fancy Product Designer → Version. If version is 6.4.8 or lower, you are vulnerable.Check Version:
wp plugin list --name=fancy-product-designer --field=version (if WP-CLI installed)Verify Fix Applied:
Verify plugin version is 6.4.9 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /wp-admin/admin-ajax.php with action=fpd_custom_uplod_file
- Unusual outbound connections from web server to internal IPs or metadata services
Network Indicators:
- Web server making HTTP requests to internal IP ranges (10.x, 172.16-31.x, 192.168.x)
- Requests to cloud metadata endpoints (169.254.169.254)
SIEM Query:
source="web_server_logs" AND uri="/wp-admin/admin-ajax.php" AND post_data CONTAINS "fpd_custom_uplod_file"