CVE-2021-4447
📋 TL;DR
This vulnerability in the Essential Addons for Elementor WordPress plugin allows attackers with access to the Elementor page builder to create registration forms that default to administrator role, enabling privilege escalation to administrative access. It affects WordPress sites using vulnerable plugin versions. Attackers need at least contributor-level access to exploit this.
💻 Affected Systems
- Essential Addons for Elementor Lite (WordPress plugin)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete site takeover with administrative access, allowing data theft, malware injection, defacement, and backdoor installation.
Likely Case
Unauthorized administrative account creation leading to content manipulation, plugin/theme installation, and potential data exposure.
If Mitigated
Limited impact if proper access controls restrict who can use Elementor page builder and registration forms are monitored.
🎯 Exploit Status
Exploitation requires authenticated access to Elementor page builder. Public proof-of-concept exists in security advisories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.6.5 and later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Essential Addons for Elementor'. 4. Click 'Update Now' if available, or download version 4.6.5+ from WordPress repository. 5. Activate updated plugin.
🔧 Temporary Workarounds
Restrict Elementor Access
allLimit who can access Elementor page builder to trusted administrators only
Use WordPress role management plugins or custom code to restrict 'edit_posts' capability for untrusted users
Disable Registration Forms
allRemove or disable registration form functionality from vulnerable plugin
Add define('EAEL_DISABLE_REGISTRATION', true); to wp-config.php
🧯 If You Can't Patch
- Temporarily deactivate Essential Addons for Elementor plugin
- Implement strict monitoring for new user registrations and administrator role assignments
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins → Essential Addons for Elementor version. If version ≤ 4.6.4, vulnerable.Check Version:
wp plugin list --name='essential-addons-for-elementor-lite' --field=versionVerify Fix Applied:
Confirm plugin version is 4.6.5 or higher. Test that non-admin users cannot create registration forms with administrator role.📡 Detection & Monitoring
Log Indicators:
- Unexpected user registration events
- User role changes to administrator
- Elementor form creation by non-admin users
Network Indicators:
- POST requests to /wp-admin/admin-ajax.php with registration actions
- Unusual wp-login.php registration attempts
SIEM Query:
source="wordpress" (event="user_registered" AND user_role="administrator") OR (event="plugin_edited" AND plugin="essential-addons-for-elementor")🔗 References
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2526471%40essential-addons-for-elementor-lite&new=2526471%40essential-addons-for-elementor-lite&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/be098ee9-b749-4908-85e8-e717d019609a?source=cve
