CVE-2025-8487
📋 TL;DR
The Kubio AI Page Builder WordPress plugin has an authorization bypass vulnerability that allows authenticated users with Subscriber-level access or higher to install the Image Hub plugin without proper permissions. This affects all WordPress sites using Kubio AI Page Builder versions up to 2.6.3. Attackers can exploit this to install potentially malicious plugins on vulnerable WordPress installations.
💻 Affected Systems
- Kubio AI Page 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
An attacker could install a malicious plugin that provides backdoor access, executes arbitrary code, steals sensitive data, or takes full control of the WordPress site.
Likely Case
Attackers install legitimate but unwanted plugins to create backdoors, modify site content, or establish persistence for future attacks.
If Mitigated
With proper user access controls and monitoring, impact is limited to unauthorized plugin installation which can be detected and removed.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple - just a crafted AJAX request to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.6.4 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3361499/kubio/trunk/lib/integrations/image-hub/image-hub.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Go to Plugins → Installed Plugins. 3. Find Kubio AI Page Builder. 4. Click 'Update Now' if update available. 5. Alternatively, download version 2.6.4+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Disable vulnerable AJAX endpoint
WordPressRemove or block access to the kubio-image-hub-install-plugin AJAX action
Add to theme's functions.php or custom plugin: remove_action('wp_ajax_kubio-image-hub-install-plugin', 'kubio_image_hub_install_plugin');
🧯 If You Can't Patch
- Restrict user registration and minimize authenticated user accounts
- Implement web application firewall rules to block requests to kubio-image-hub-install-plugin AJAX endpoint
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Kubio AI Page Builder → Version. If version is 2.6.3 or lower, site is vulnerable.Check Version:
wp plugin get kubio --field=versionVerify Fix Applied:
After update, verify version is 2.6.4 or higher. Test authenticated AJAX request to /wp-admin/admin-ajax.php?action=kubio-image-hub-install-plugin should return permission error.📡 Detection & Monitoring
Log Indicators:
- POST requests to /wp-admin/admin-ajax.php with action=kubio-image-hub-install-plugin
- WordPress plugin installation logs from non-admin users
- Unexpected Image Hub plugin installation events
Network Indicators:
- HTTP POST to admin-ajax.php with kubio-image-hub-install-plugin parameter from non-admin IPs
SIEM Query:
source="wordpress.log" AND "admin-ajax.php" AND "kubio-image-hub-install-plugin"🔗 References
- https://plugins.trac.wordpress.org/browser/kubio/tags/2.6.3/lib/integrations/image-hub/image-hub.php#L70
- https://plugins.trac.wordpress.org/changeset/3361499/kubio/trunk/lib/integrations/image-hub/image-hub.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/1f528c89-2b8c-4750-b9eb-47ebd8c1630e?source=cve
