CVE-2025-49399
📋 TL;DR
This CSRF vulnerability in Basix NEX-Forms WordPress plugin allows attackers to trick authenticated administrators into performing unintended actions. It affects all WordPress sites using NEX-Forms versions up to 9.1.3. Attackers could modify form settings or plugin configurations without the admin's knowledge.
💻 Affected Systems
- Basix NEX-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
Attackers could completely reconfigure forms to capture sensitive user data, inject malicious scripts, or modify plugin settings to create persistent backdoors.
Likely Case
Attackers modify form configurations to capture submitted data, change form behaviors, or inject malicious content into forms.
If Mitigated
With proper CSRF protections and admin awareness, impact is limited to temporary configuration changes that can be reverted.
🎯 Exploit Status
CSRF attacks are well-understood and easy to weaponize. Exploit requires social engineering to trick admin into visiting malicious page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.1.4 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Go to Plugins → Installed Plugins
3. Find NEX-Forms and click 'Update Now'
4. Verify version is 9.1.4 or higher
🔧 Temporary Workarounds
CSRF Protection Middleware
allImplement custom CSRF token validation for NEX-Forms admin endpoints
Add CSRF token validation in WordPress theme functions.php or custom plugin
Admin Session Management
allEnforce strict session timeouts and require re-authentication for sensitive actions
Use WordPress security plugins to enforce session management
🧯 If You Can't Patch
- Temporarily disable NEX-Forms plugin and use alternative form solutions
- Implement web application firewall rules to block CSRF attempts targeting NEX-Forms endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → NEX-Forms version. If version is 9.1.3 or lower, system is vulnerable.Check Version:
wp plugin list --name=nex-forms --field=versionVerify Fix Applied:
After update, verify NEX-Forms version shows 9.1.4 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /wp-admin/admin-ajax.php with nex_forms action parameters from unexpected referrers
- Unusual form configuration changes in NEX-Forms settings
Network Indicators:
- CSRF attack patterns with missing or mismatched referrer headers for NEX-Forms endpoints
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin-ajax.php" AND query="action=nex_forms") AND NOT referrer_domain="yourdomain.com"