CVE-2025-54686
📋 TL;DR
CVE-2025-54686 is a PHP object injection vulnerability in the Exertio WordPress theme that allows attackers to execute arbitrary code through deserialization of untrusted data. This affects all Exertio theme installations from unknown versions through 1.3.2. Attackers can exploit this to gain complete control over affected WordPress sites.
💻 Affected Systems
- Exertio WordPress Theme
⚠️ 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, ransomware deployment, or website defacement.
Likely Case
Remote code execution allowing attackers to install backdoors, create admin users, steal sensitive data, or deploy malware.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though deserialization vulnerabilities remain dangerous.
🎯 Exploit Status
Public exploit details are available on Patchstack, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.3 or later
Vendor Advisory: https://patchstack.com/database/wordpress/theme/exertio/vulnerability/wordpress-exertio-theme-1-3-2-php-object-injection-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Check for Exertio theme updates. 4. Update to version 1.3.3 or later. 5. If no update is available, remove the theme immediately.
🔧 Temporary Workarounds
Disable Exertio Theme
allTemporarily disable the vulnerable theme until patched
wp theme deactivate exertio
wp theme activate twentytwentyfour
Restrict PHP Deserialization
linuxAdd PHP configuration to restrict dangerous deserialization functions
Add 'disable_functions = unserialize' to php.ini (not recommended for production)
🧯 If You Can't Patch
- Immediately disable or remove the Exertio theme from all WordPress installations
- Implement web application firewall (WAF) rules to block deserialization attempts and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress theme version: In WordPress admin, go to Appearance > Themes and check Exertio version. If version is 1.3.2 or earlier, you are vulnerable.Check Version:
wp theme list --field=name,version | grep exertioVerify Fix Applied:
Verify Exertio theme version is 1.3.3 or later in WordPress admin panel under Appearance > Themes.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress endpoints
- PHP unserialize() errors in logs
- Unexpected file uploads or modifications in wp-content/themes/exertio
Network Indicators:
- HTTP POST requests containing serialized PHP objects
- Requests to unusual WordPress endpoints with base64 encoded data
SIEM Query:
source="wordpress.log" AND ("unserialize" OR "php_object_injection" OR "exertio")