CVE-2025-31612
📋 TL;DR
This vulnerability allows attackers to inject malicious PHP objects through deserialization of untrusted data in the CBX Poll WordPress plugin. Successful exploitation could lead to remote code execution, affecting all WordPress sites running vulnerable versions of this plugin.
💻 Affected Systems
- CBX Poll 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
Remote code execution leading to complete system compromise, data theft, and website defacement.
Likely Case
Unauthenticated attackers gain shell access to the web server, install backdoors, and pivot to internal networks.
If Mitigated
Attackers can only achieve limited impact due to proper network segmentation and application hardening.
🎯 Exploit Status
Public exploit details available on Patchstack, making weaponization likely. No authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.2.8 or later
Vendor Advisory: https://patchstack.com/database/wordpress/plugin/cbxpoll/vulnerability/wordpress-cbx-poll-plugin-1-2-7-php-object-injection-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find CBX Poll and click 'Update Now'. 4. Verify version is 1.2.8 or higher.
🔧 Temporary Workarounds
Disable CBX Poll Plugin
allTemporarily disable the vulnerable plugin until patching is possible.
wp plugin deactivate cbxpoll
Restrict Plugin Access
allUse web application firewall to block requests to CBX Poll endpoints.
# Add to .htaccess for Apache:
<FilesMatch "cbxpoll">
Order Deny,Allow
Deny from all
</FilesMatch>
# Add to nginx config:
location ~* /wp-content/plugins/cbxpoll/ {
deny all;
}
🧯 If You Can't Patch
- Disable CBX Poll plugin immediately via WordPress admin or command line
- Implement strict network segmentation and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → CBX Poll version. If version is 1.2.7 or lower, you are vulnerable.Check Version:
wp plugin get cbxpoll --field=versionVerify Fix Applied:
Verify CBX Poll plugin version is 1.2.8 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to CBX Poll endpoints
- PHP serialized data in request parameters
- Unexpected file creation in wp-content/uploads
Network Indicators:
- HTTP requests containing serialized PHP objects
- Traffic to known CBX Poll exploit paths
SIEM Query:
source="web_logs" AND (uri="*cbxpoll*" OR params="*O:*") AND status="200"