CVE-2024-12477
📋 TL;DR
The Avada Builder WordPress plugin has a stored XSS vulnerability that allows authenticated attackers with contributor-level access or higher to inject malicious scripts into website pages. These scripts execute whenever users view the compromised pages, potentially stealing credentials or performing unauthorized actions. All WordPress sites using Avada Builder versions up to 3.11.11 are affected.
💻 Affected Systems
- Avada Builder WordPress Plugin
📦 What is this software?
Avada Builder by Theme Fusion
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers with contributor accounts inject malicious scripts to steal user session cookies or credentials, potentially compromising user accounts.
If Mitigated
With proper access controls and monitoring, impact is limited to defacement or minor data leakage from affected pages.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once attacker has contributor-level credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.11.12 or later
Vendor Advisory: https://avada.com
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins > Installed Plugins
3. Find Avada Builder plugin
4. Click 'Update Now' if update available
5. Alternatively, download latest version from WordPress repository and manually update
🔧 Temporary Workarounds
Disable Avada Builder Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate avada-builder
Restrict Contributor Access
allTemporarily remove contributor-level user accounts or restrict their permissions
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to limit script execution
- Enable WordPress security plugins with XSS protection and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Avada Builder version. If version is 3.11.11 or lower, system is vulnerable.Check Version:
wp plugin get avada-builder --field=versionVerify Fix Applied:
After updating, verify Avada Builder version is 3.11.12 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php with Avada Builder parameters
- Suspicious content modifications by contributor-level users
- JavaScript payloads in post/page content
Network Indicators:
- Unexpected script tags in page responses containing Avada Builder shortcodes
- External script loads from unusual domains in page content
SIEM Query:
source="wordpress.log" AND ("avada" OR "fusion" OR "shortcode") AND ("script" OR "javascript" OR "onclick" OR "onload")