CVE-2024-6931
📋 TL;DR
This vulnerability allows unauthenticated attackers to inject malicious scripts into WordPress sites using The Events Calendar plugin. When users view pages containing RSVP submissions with injected scripts, the scripts execute in their browsers. All WordPress sites using vulnerable plugin versions are affected.
💻 Affected Systems
- The Events Calendar WordPress plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, deface websites, or perform actions on behalf of authenticated users.
Likely Case
Attackers inject malicious scripts to steal user session cookies or redirect users to phishing sites.
If Mitigated
With proper input validation and output escaping, script execution would be prevented even if injection occurs.
🎯 Exploit Status
XSS vulnerabilities are commonly weaponized and this requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.6.4
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3150170/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find The Events Calendar plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 6.6.4+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable RSVP functionality
allTemporarily disable RSVP features in The Events Calendar settings
Apply WAF rules
allConfigure web application firewall to block XSS payloads in RSVP name fields
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to limit script execution
- Use WordPress security plugins with XSS protection features
🔍 How to Verify
Check if Vulnerable:
Check plugin version in WordPress admin → Plugins → Installed PluginsCheck Version:
wp plugin list --name='the-events-calendar' --field=versionVerify Fix Applied:
Verify plugin version is 6.6.4 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unusual RSVP submissions with script tags or JavaScript code in name field
- Multiple failed RSVP submissions with suspicious payloads
Network Indicators:
- HTTP POST requests to /wp-admin/admin-ajax.php with script payloads in RSVP data
SIEM Query:
source="wordpress.log" AND "RSVP" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")