CVE-2023-6036
📋 TL;DR
The Web3 WordPress plugin before version 3.0.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to log in as any existing user, including administrators, if they know the username. This affects all WordPress sites running vulnerable versions of the Web3 plugin. Attackers can gain full administrative access without valid credentials.
💻 Affected Systems
- Web3 WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access, install backdoors, steal sensitive data, deface websites, or compromise the entire WordPress installation and potentially the underlying server.
Likely Case
Attackers gain administrative privileges, modify content, install malicious plugins/themes, or exfiltrate user data and configuration information.
If Mitigated
With proper network segmentation and monitoring, impact is limited to the WordPress instance, but administrative access still enables significant damage within that environment.
🎯 Exploit Status
Exploitation requires only knowledge of a valid username and access to the vulnerable endpoint. No authentication or special privileges needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.0
Vendor Advisory: https://wpscan.com/vulnerability/7f30ab20-805b-422c-a9a5-21d39c570ee4/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Locate Web3 plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin, then install version 3.0.0+ from WordPress repository.
🔧 Temporary Workarounds
Disable Web3 Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate web3
Restrict Access to WordPress Admin
linuxLimit access to WordPress admin interface using firewall rules
iptables -A INPUT -p tcp --dport 80 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s trusted_ip -j ACCEPT
🧯 If You Can't Patch
- Immediately disable or remove the Web3 plugin from all WordPress installations
- Implement web application firewall (WAF) rules to block authentication bypass attempts targeting the vulnerable endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Web3 plugin version. If version is below 3.0.0, system is vulnerable.Check Version:
wp plugin list --name=web3 --field=versionVerify Fix Applied:
Confirm Web3 plugin version is 3.0.0 or higher in WordPress admin panel. Test authentication functionality works correctly.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts from unknown IP addresses
- Multiple failed login attempts followed by successful login without password verification
- Administrative actions from previously inactive user accounts
Network Indicators:
- HTTP POST requests to /wp-admin/admin-ajax.php with action parameters related to Web3 authentication
- Unusual traffic patterns to WordPress authentication endpoints
SIEM Query:
source="wordpress.log" AND ("handle_auth_request" OR "hadle_login_request" OR "web3") AND status=200