CVE-2025-53303
📋 TL;DR
This vulnerability allows attackers to inject malicious objects through deserialization of untrusted data in the ThemeMove Core WordPress plugin. Successful exploitation could lead to remote code execution or other malicious actions. All WordPress sites using vulnerable versions of ThemeMove Core are affected.
💻 Affected Systems
- ThemeMove Core 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 persistent backdoor installation.
Likely Case
Arbitrary code execution within WordPress context, allowing plugin/theme manipulation, admin access, or site defacement.
If Mitigated
Limited impact if proper input validation and output encoding are implemented elsewhere in the application stack.
🎯 Exploit Status
PHP object injection vulnerabilities are commonly exploited and often lead to RCE.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.4.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find ThemeMove Core and update to version 1.4.3 or later. 4. If auto-update fails, download from WordPress.org and manually replace files.
🔧 Temporary Workarounds
Disable ThemeMove Core Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate thememove-core
Web Application Firewall Rule
allBlock requests containing serialized PHP objects
WAF-specific configuration to block patterns like O:[0-9]+:"[^"]+"
🧯 If You Can't Patch
- Remove ThemeMove Core plugin entirely and use alternative functionality
- Implement strict input validation and sanitization at application layer
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for ThemeMove Core versionCheck Version:
wp plugin get thememove-core --field=versionVerify Fix Applied:
Verify ThemeMove Core version is 1.4.3 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or similar endpoints
- PHP errors related to unserialize() or object injection
Network Indicators:
- HTTP requests containing serialized PHP object patterns (O:8:"stdClass":)
SIEM Query:
source="wordpress.log" AND ("unserialize" OR "O:[0-9]+:")