CVE-2024-6152
📋 TL;DR
The Flipbox Builder WordPress plugin is vulnerable to PHP Object Injection via insecure deserialization, allowing authenticated attackers with Contributor-level access or higher to inject malicious PHP objects. If a POP chain exists through other installed plugins or themes, this could lead to arbitrary file deletion, data theft, or remote code execution. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- Flipbox Builder 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 exfiltration, or website defacement if a suitable POP chain exists in other installed components.
Likely Case
Limited impact due to no known POP chain in the vulnerable plugin itself, but potential for data exposure or file manipulation if other vulnerable components are present.
If Mitigated
Minimal impact with proper access controls, regular updates, and security monitoring in place.
🎯 Exploit Status
Exploitation requires authenticated access and depends on availability of POP chains in the target environment.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.5
Vendor Advisory: https://plugins.trac.wordpress.org/browser/flipbox-builder/trunk/template-front/shortcode.php#L30
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Flipbox Builder plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and remove plugin immediately.
🔧 Temporary Workarounds
Remove Contributor Access
allRestrict user roles to only trusted administrators until patch is applied
Disable Plugin
linuxTemporarily deactivate the Flipbox Builder plugin
wp plugin deactivate flipbox-builder
🧯 If You Can't Patch
- Remove Contributor and higher access from untrusted users
- Implement web application firewall rules to block deserialization attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Flipbox Builder version. If version is 1.5 or earlier, you are vulnerable.Check Version:
wp plugin get flipbox-builder --field=versionVerify Fix Applied:
Verify plugin version is higher than 1.5 in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php with serialized data
- PHP warnings about unserialize() in error logs
- Unexpected file operations by web server user
Network Indicators:
- HTTP requests containing serialized PHP objects in parameters
- Unusual traffic patterns from Contributor-level user accounts
SIEM Query:
source="wordpress.log" AND ("unserialize" OR "flipbox_builder" OR "admin-ajax.php")🔗 References
- https://plugins.trac.wordpress.org/browser/flipbox-builder/trunk/template-front/shortcode.php#L30
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0e9cd38a-b2cd-4801-a06b-4e965fa72e04?source=cve
- https://plugins.trac.wordpress.org/browser/flipbox-builder/trunk/template-front/shortcode.php#L30
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0e9cd38a-b2cd-4801-a06b-4e965fa72e04?source=cve
