CVE-2025-68853
📋 TL;DR
This CVE describes a PHP object injection vulnerability in the Kleor Contact Manager WordPress plugin. Attackers can exploit insecure deserialization to execute arbitrary code or manipulate application logic. All WordPress sites running Contact Manager version 9.1.1 or earlier are affected.
💻 Affected Systems
- Kleor Contact Manager 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, or website defacement.
Likely Case
Arbitrary code execution within the WordPress context, potentially allowing plugin/theme modification, admin access, or data exfiltration.
If Mitigated
Limited impact if proper input validation and output encoding are implemented elsewhere in the application.
🎯 Exploit Status
Exploitation requires crafting malicious serialized objects, but no public proof-of-concept is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: > 9.1.1
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Contact Manager' and check if update is available. 4. Click 'Update Now' if update exists. 5. If no update exists, disable or remove the plugin immediately.
🔧 Temporary Workarounds
Disable Contact Manager Plugin
allTemporarily disable the vulnerable plugin until patched version is available.
wp plugin deactivate contact-manager
Remove Contact Manager Plugin
allCompletely remove the vulnerable plugin if functionality is not critical.
wp plugin delete contact-manager
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block deserialization attacks
- Restrict access to the WordPress admin interface using IP whitelisting
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Contact Manager version <= 9.1.1Check Version:
wp plugin get contact-manager --field=versionVerify Fix Applied:
Verify Contact Manager plugin version is > 9.1.1 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to contact-manager endpoints
- PHP errors related to unserialize() or object instantiation
Network Indicators:
- HTTP requests containing serialized PHP objects in parameters
SIEM Query:
source="wordpress" AND (uri_path="*contact-manager*" AND (http_method="POST" OR parameters CONTAINS "O:"))