CVE-2024-13498
📋 TL;DR
The NEX-Forms WordPress plugin up to version 8.8.1 allows unauthenticated attackers to access uploaded files due to insufficient directory listing prevention and predictable file names. This exposes sensitive data submitted through forms, affecting all WordPress sites using vulnerable plugin versions.
💻 Affected Systems
- NEX-Forms – Ultimate Form Builder – Contact forms and much more 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 download all files uploaded through forms, potentially exposing personally identifiable information, financial data, confidential documents, or credentials.
Likely Case
Attackers systematically scan for and download accessible uploaded files, extracting sensitive user-submitted information.
If Mitigated
With proper file permissions and web server configuration, exposure is limited but still possible if directory listing is enabled.
🎯 Exploit Status
Exploitation requires only web access to the WordPress installation and knowledge of file upload paths.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.8.2
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3235420/nex-forms-express-wp-form-builder
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find NEX-Forms plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 8.8.2+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable plugin
allTemporarily disable the NEX-Forms plugin until patched
Restrict directory access
linuxAdd .htaccess rules to block directory listing and file access
Options -Indexes
Deny from all
🧯 If You Can't Patch
- Implement web application firewall rules to block access to plugin upload directories
- Monitor file access logs for suspicious patterns targeting upload directories
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → NEX-Forms version. If version is 8.8.1 or lower, you are vulnerable.Check Version:
wp plugin list --name=nex-forms --field=versionVerify Fix Applied:
Confirm plugin version is 8.8.2 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Multiple 200/304 requests to /wp-content/uploads/nex-forms/uploaded-files/
- Pattern of sequential file name requests
Network Indicators:
- Unusual volume of GET requests to plugin upload directories
- Traffic patterns suggesting directory enumeration
SIEM Query:
source="web_logs" AND (uri="/wp-content/uploads/nex-forms/uploaded-files/*" OR uri CONTAINS "nex-forms/uploaded") AND status=200 | stats count by src_ip