CVE-2024-13421
📋 TL;DR
This vulnerability in the Real Estate 7 WordPress theme allows unauthenticated attackers to register new administrative user accounts due to improper role restrictions during registration. All WordPress sites using this theme up to version 3.5.1 are affected, potentially giving attackers full control over vulnerable websites.
💻 Affected Systems
- Real Estate 7 WordPress Theme
📦 What is this software?
Real Estate 7 by Contempothemes
⚠️ Risk & Real-World Impact
Worst Case
Complete site takeover with administrative privileges, allowing data theft, defacement, malware injection, and backdoor persistence.
Likely Case
Attackers create admin accounts to install backdoors, steal sensitive data, or use the site for malicious activities like phishing or spam.
If Mitigated
With proper monitoring and authentication controls, unauthorized admin creation would be detected and blocked before significant damage occurs.
🎯 Exploit Status
Simple HTTP request manipulation to register admin accounts; no authentication required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.5.2 or later
Vendor Advisory: https://contempothemes.com/changelog/
Restart Required: No
Instructions:
1. Update Real Estate 7 theme to version 3.5.2 or later via WordPress admin panel. 2. Verify update completes successfully. 3. Test user registration functionality.
🔧 Temporary Workarounds
Disable User Registration
allTemporarily disable new user registration in WordPress settings
Navigate to Settings > General in WordPress admin and uncheck 'Anyone can register'
Block Registration Endpoints
linuxUse web application firewall or .htaccess to block registration requests
# Add to .htaccess:
RewriteCond %{REQUEST_URI} ^/wp-login\.php\?action=register [NC]
RewriteRule ^ - [F,L]
🧯 If You Can't Patch
- Implement strict monitoring for new user creation, especially admin accounts
- Deploy web application firewall with rules to detect and block suspicious registration attempts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes for Real Estate 7 theme version 3.5.1 or earlierCheck Version:
wp theme list --field=name,version --path=/path/to/wordpress | grep 'real-estate-7'Verify Fix Applied:
Confirm theme version is 3.5.2 or later and test that only appropriate roles can be selected during registration📡 Detection & Monitoring
Log Indicators:
- Multiple failed registration attempts
- Successful registration with admin role
- New admin user creation from unusual IPs
Network Indicators:
- POST requests to /wp-login.php?action=register with role parameters
- Unusual registration traffic patterns
SIEM Query:
source="wordpress.log" AND ("action=register" OR "new user registration") AND ("role=administrator" OR "capability=manage_options")