CVE-2025-67944
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code on WordPress sites running the vulnerable Nelio AB Testing plugin. Attackers can inject malicious code that runs with the plugin's privileges, potentially compromising the entire WordPress installation. All WordPress sites using Nelio AB Testing version 8.1.8 or earlier are affected.
💻 Affected Systems
- Nelio AB Testing 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 leading to data theft, ransomware deployment, or website defacement. Attackers could gain persistent access and pivot to other systems.
Likely Case
Website takeover, malware injection, credential theft, and SEO spam injection affecting site visitors.
If Mitigated
Limited impact if plugin runs with minimal privileges and proper web application firewalls are in place.
🎯 Exploit Status
The vulnerability is publicly documented and WordPress plugins are common targets for automated exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.1.9 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Nelio AB Testing and click 'Update Now'. 4. Verify update to version 8.1.9 or later.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate nelio-ab-testing
Web Application Firewall
allImplement WAF rules to block code injection attempts
🧯 If You Can't Patch
- Remove the plugin entirely if not essential
- Restrict access to WordPress admin panel using IP whitelisting
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Nelio AB Testing version. If version is 8.1.8 or earlier, you are vulnerable.Check Version:
wp plugin get nelio-ab-testing --field=versionVerify Fix Applied:
Verify plugin version is 8.1.9 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- PHP execution errors in web server logs
- Unauthorized file creation/modification
Network Indicators:
- HTTP requests containing suspicious code patterns to /wp-content/plugins/nelio-ab-testing/
SIEM Query:
source="web_server_logs" AND (uri="/wp-content/plugins/nelio-ab-testing/*" AND (method="POST" OR method="PUT")) AND (payload="eval(" OR payload="system(" OR payload="exec(")