CVE-2024-6926
📋 TL;DR
The Viral Signup WordPress plugin through version 2.1 contains a SQL injection vulnerability that allows unauthenticated attackers to execute arbitrary SQL commands via AJAX requests. This affects all WordPress sites running the vulnerable plugin version. Attackers can potentially read, modify, or delete database content.
💻 Affected Systems
- WordPress Viral Signup Plugin
📦 What is this software?
Viral Signup by Wow Company
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, privilege escalation, site defacement, or full system takeover if database credentials allow file system access.
Likely Case
Data exfiltration of sensitive information (user credentials, personal data), database manipulation, or plugin/theme file writes leading to backdoor installation.
If Mitigated
Limited impact if proper WAF rules block SQL injection patterns and database user has minimal privileges.
🎯 Exploit Status
SQL injection via AJAX endpoint available to unauthenticated users. Simple HTTP requests can trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2 or later
Vendor Advisory: https://wpscan.com/vulnerability/9ce96ce5-fcf0-4d7a-b562-f63ea3418d93/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Viral Signup plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin immediately.
🔧 Temporary Workarounds
Block Vulnerable AJAX Endpoint
linuxAdd .htaccess rule to block access to the vulnerable AJAX endpoint
# Add to .htaccess in WordPress root directory
RewriteEngine On
RewriteRule ^wp-admin/admin-ajax\.php\?action=viral_signup.* - [F,L]
Disable Plugin via Database
allDirectly disable plugin via WordPress database if admin access unavailable
UPDATE wp_options SET option_value = 'a:0:{}' WHERE option_name = 'active_plugins';
🧯 If You Can't Patch
- Immediately deactivate and remove the Viral Signup plugin from all WordPress installations
- Implement WAF rules to block SQL injection patterns targeting WordPress AJAX endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Viral Signup plugin version 2.1 or earlierCheck Version:
grep -r "Version:" /path/to/wordpress/wp-content/plugins/viral-signup/*.php | head -1Verify Fix Applied:
Verify plugin version is 2.2 or later, or confirm plugin is completely removed from /wp-content/plugins/ directory📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with 'action=viral_signup' parameter
- SQL syntax errors in WordPress debug logs
- Multiple failed login attempts following AJAX requests
Network Indicators:
- HTTP POST requests containing SQL keywords (UNION, SELECT, INSERT) in parameters
- Unusual traffic spikes to /wp-admin/admin-ajax.php
SIEM Query:
source="web_access.log" AND uri_path="/wp-admin/admin-ajax.php" AND (query_string="*action=viral_signup*" OR query_string="*UNION*" OR query_string="*SELECT*" OR query_string="*INSERT*")