CVE-2023-37865
📋 TL;DR
This vulnerability allows attackers to bypass IP-based country blocking restrictions in the IP2Location Country Blocker WordPress plugin by spoofing IP addresses. It affects all WordPress sites using vulnerable versions of this plugin, potentially allowing blocked users to access restricted content.
💻 Affected Systems
- WordPress IP2Location Country Blocker Plugin
📦 What is this software?
Country Blocker by Ip2location
⚠️ Risk & Real-World Impact
Worst Case
Attackers from blocked countries could access restricted content, bypass geographical content controls, and potentially access admin functionality if combined with other vulnerabilities.
Likely Case
Users from blocked countries can access content that should be geographically restricted, undermining the plugin's primary security function.
If Mitigated
With proper network controls and additional authentication layers, the impact is limited to circumvention of geographical content restrictions only.
🎯 Exploit Status
Exploitation involves IP spoofing techniques which are well-documented and relatively simple to implement.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.29.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find IP2Location Country Blocker. 4. Click 'Update Now' if available, or manually update to version 2.29.2+. 5. Verify plugin is active and functioning.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate ip2location-country-blocker
Web Application Firewall Rule
allImplement WAF rules to detect and block IP spoofing attempts
🧯 If You Can't Patch
- Implement network-level IP filtering at firewall/load balancer instead of plugin
- Add additional authentication layers for restricted content
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for IP2Location Country Blocker versionCheck Version:
wp plugin get ip2location-country-blocker --field=versionVerify Fix Applied:
Verify plugin version is 2.29.2 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual IP address patterns in access logs
- Requests from blocked countries succeeding
Network Indicators:
- Spoofed IP headers in HTTP requests
- Abnormal geographical access patterns
SIEM Query:
source="wordpress" plugin="ip2location-country-blocker" (country_code IN blocked_countries) AND response_code=200🔗 References
- https://patchstack.com/database/vulnerability/ip2location-country-blocker/wordpress-ip2location-country-blocker-plugin-2-29-1-ip-bypass-vulnerability-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/ip2location-country-blocker/wordpress-ip2location-country-blocker-plugin-2-29-1-ip-bypass-vulnerability-vulnerability?_s_id=cve
