CVE-2025-13407
📋 TL;DR
The Gravity Forms WordPress plugin before version 2.9.23.1 contains a file upload vulnerability in its chunked upload functionality that allows attackers to upload PHP files. This can lead to remote code execution if attackers can discover the upload path. All WordPress sites using vulnerable versions of Gravity Forms are affected.
💻 Affected Systems
- Gravity Forms 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
Full site compromise with attacker gaining complete control over the WordPress installation, allowing data theft, defacement, or use as a foothold for further attacks.
Likely Case
Attackers upload web shells to gain persistent access, execute arbitrary code, and potentially compromise the entire server environment.
If Mitigated
Limited impact if proper file upload restrictions and web application firewalls are in place to block malicious uploads.
🎯 Exploit Status
Attack requires ability to discover or enumerate upload paths, which adds complexity but is often achievable through information disclosure or brute force.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.9.23.1
Vendor Advisory: https://wpscan.com/vulnerability/e09908fb-f5ad-45ca-8698-c0d596fd39cc/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Gravity Forms and click 'Update Now'. 4. Verify version shows 2.9.23.1 or higher.
🔧 Temporary Workarounds
Disable Gravity Forms file uploads
allTemporarily disable all file upload functionality in Gravity Forms forms
Web server file type restrictions
linuxConfigure web server to block execution of PHP files in upload directories
# Apache .htaccess example
<FilesMatch "\.php$">
Order Allow,Deny
Deny from all
</FilesMatch>
# Nginx configuration example
location ~* \.php$ {
deny all;
}
🧯 If You Can't Patch
- Implement web application firewall rules to block PHP file uploads through Gravity Forms endpoints
- Restrict access to upload directories using .htaccess or equivalent web server configuration
🔍 How to Verify
Check if Vulnerable:
Check Gravity Forms version in WordPress admin under Plugins → Installed PluginsCheck Version:
# WordPress CLI
wp plugin list --name=gravityforms --field=versionVerify Fix Applied:
Confirm Gravity Forms version is 2.9.23.1 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to Gravity Forms endpoints
- PHP file creation in upload directories
- Multiple failed upload attempts followed by successful PHP upload
Network Indicators:
- POST requests to Gravity Forms upload endpoints with PHP file content
- Unusual traffic to upload directories
SIEM Query:
source="web_server_logs" AND (uri="/wp-content/uploads/gravity_forms/*.php" OR uri="/wp-json/gf/v2/entries/*/files")