CVE-2022-1386
📋 TL;DR
This vulnerability in the Fusion Builder WordPress plugin (used by Avada theme) allows attackers to make arbitrary HTTP requests from the vulnerable server. The server-side request forgery (SSRF) flaw can bypass firewalls to access internal network resources. All WordPress sites using affected plugin versions are vulnerable.
💻 Affected Systems
- Fusion Builder WordPress plugin
- Avada WordPress theme
📦 What is this software?
Avada by Theme Fusion
Fusion Builder by Fusion Builder Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, steal sensitive data, pivot to internal networks, or perform remote code execution via chained attacks.
Likely Case
Data exfiltration from internal services, reconnaissance of internal network, or interaction with cloud metadata services.
If Mitigated
Limited impact if network segmentation restricts internal access and web server has minimal privileges.
🎯 Exploit Status
Simple HTTP request manipulation required. Public exploit code exists.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fusion Builder 3.6.2+, Avada theme 7.6.2+
Vendor Advisory: https://theme-fusion.com/version-7-6-2-security-update/
Restart Required: No
Instructions:
1. Update Avada theme to 7.6.2 or later via WordPress admin panel. 2. Update Fusion Builder plugin to 3.6.2 or later. 3. Clear any caching plugins. 4. Test site functionality.
🔧 Temporary Workarounds
Disable vulnerable plugin
linuxTemporarily disable Fusion Builder plugin until patched
wp plugin deactivate fusion-builder
Web Application Firewall rule
allBlock requests containing SSRF patterns to vulnerable endpoints
🧯 If You Can't Patch
- Implement strict network segmentation to isolate web server from internal resources
- Deploy web application firewall with SSRF detection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel for Avada theme version <7.6.2 or Fusion Builder plugin version <3.6.2Check Version:
wp theme list --field=name,version | grep -i avada && wp plugin list --field=name,version | grep -i fusion-builderVerify Fix Applied:
Confirm Avada theme version >=7.6.2 and Fusion Builder plugin version >=3.6.2 are installed📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from web server to internal IPs
- Requests to /wp-admin/admin-ajax.php with SSRF parameters
Network Indicators:
- Web server making unexpected HTTP requests to internal services
- Traffic to cloud metadata endpoints from web server
SIEM Query:
source="web_server_logs" AND (uri="/wp-admin/admin-ajax.php" AND (param="fusion_load_form" OR param="fusion_form_nonce")) AND (dest_ip=10.0.0.0/8 OR dest_ip=172.16.0.0/12 OR dest_ip=192.168.0.0/16 OR dest_ip=169.254.169.254)🔗 References
- https://theme-fusion.com/version-7-6-2-security-update/
- https://wpscan.com/vulnerability/bf7034ab-24c4-461f-a709-3f73988b536b
- https://www.rootshellsecurity.net/rootshell-discovered-a-critical-vulnerability-in-top-wordpress-theme/
- https://theme-fusion.com/version-7-6-2-security-update/
- https://wpscan.com/vulnerability/bf7034ab-24c4-461f-a709-3f73988b536b
- https://www.rootshellsecurity.net/rootshell-discovered-a-critical-vulnerability-in-top-wordpress-theme/
