CVE-2025-13439
📋 TL;DR
The Fancy Product Designer WordPress plugin has a vulnerability that allows unauthenticated attackers to read sensitive files on the server, including wp-config.php which contains database credentials. This affects all WordPress sites using this plugin up to version 6.4.8.
💻 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
Complete server compromise through database credential theft leading to site takeover, data exfiltration, or ransomware deployment.
Likely Case
Database credential theft leading to site defacement, data theft, or installation of backdoors.
If Mitigated
Limited file disclosure if proper file permissions and web server configurations are in place.
🎯 Exploit Status
Simple HTTP request manipulation required. Public exploit code exists in security advisories.
🛠️ 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. 3. Find Fancy Product Designer. 4. Click 'Update Now' if available. 5. If not, download latest version from vendor and upload manually.
🔧 Temporary Workarounds
Disable vulnerable AJAX endpoint
allRemove or restrict access to the vulnerable fpd_custom_uplod_file AJAX action
Add to theme's functions.php or custom plugin: remove_action('wp_ajax_fpd_custom_uplod_file', 'fpd_custom_uplod_file'); remove_action('wp_ajax_nopriv_fpd_custom_uplod_file', 'fpd_custom_uplod_file');
Web Application Firewall rule
allBlock requests containing malicious file paths in the url parameter
WAF specific - create rule to block requests with patterns like '../../' or 'wp-config.php' in POST parameters
🧯 If You Can't Patch
- Disable the Fancy Product Designer plugin immediately
- Implement strict file permissions (wp-config.php should be 400 or 440)
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > 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=versionVerify Fix Applied:
After update, verify plugin version shows 6.4.9 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /wp-admin/admin-ajax.php with action=fpd_custom_uplod_file containing file paths in parameters
- Multiple 200 responses to admin-ajax.php from unauthenticated users
Network Indicators:
- Unusual file read patterns from web server
- Requests with '../../' sequences in POST data
SIEM Query:
source="web_access.log" AND uri="/wp-admin/admin-ajax.php" AND post_data="action=fpd_custom_uplod_file" AND (post_data="wp-config.php" OR post_data LIKE "%..%/")