CVE-2024-11052
📋 TL;DR
This vulnerability allows unauthenticated attackers to inject malicious JavaScript into WordPress pages using the Ninja Forms plugin. When users visit compromised pages, the scripts execute in their browsers, potentially stealing credentials or performing unauthorized actions. All WordPress sites using Ninja Forms versions up to 3.8.19 are affected.
💻 Affected Systems
- Ninja Forms – The Contact Form Builder That Grows With You
📦 What is this software?
Ninja Forms by Ninjaforms
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, redirect users to malicious sites, deface websites, or perform actions on behalf of authenticated users, potentially leading to complete site compromise.
Likely Case
Attackers inject malicious scripts to steal user session cookies, redirect visitors to phishing pages, or display unwanted advertisements.
If Mitigated
With proper input validation and output escaping, the vulnerability is prevented, and only sanitized content is displayed to users.
🎯 Exploit Status
Exploitation requires minimal technical skill as it involves injecting JavaScript via the calculations parameter, with no authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.8.20
Vendor Advisory: https://wordpress.org/plugins/ninja-forms/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Ninja Forms and click 'Update Now'. 4. Verify the plugin version is 3.8.20 or later.
🔧 Temporary Workarounds
Disable Ninja Forms Plugin
allTemporarily deactivate the plugin to prevent exploitation until patching is possible.
wp plugin deactivate ninja-forms
Implement WAF Rules
allConfigure web application firewall to block requests containing malicious scripts in the calculations parameter.
🧯 If You Can't Patch
- Restrict access to the WordPress admin panel to trusted IP addresses only.
- Implement Content Security Policy (CSP) headers to mitigate script execution from untrusted sources.
🔍 How to Verify
Check if Vulnerable:
Check the Ninja Forms plugin version in WordPress admin under Plugins > Installed Plugins.Check Version:
wp plugin get ninja-forms --field=versionVerify Fix Applied:
Confirm the plugin version is 3.8.20 or higher after updating.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with calculations parameter containing script tags
- Multiple failed login attempts following script injection
Network Indicators:
- Outbound connections to unknown domains from your WordPress site
- Unexpected JavaScript payloads in HTTP responses
SIEM Query:
source="wordpress.log" AND "calculations" AND ("<script>" OR "javascript:")