CVE-2024-56265
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the WooCommerce PDF Vouchers WordPress plugin. When users visit pages containing these scripts, attackers can steal session cookies, redirect users, or perform actions on their behalf. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- WooCommerce PDF Vouchers WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full control of the WordPress site, install backdoors, deface the site, or steal customer data including payment information.
Likely Case
Attackers steal user session cookies to hijack accounts, redirect users to malicious sites, or display phishing content to steal credentials.
If Mitigated
With proper input validation and output encoding, the malicious scripts are neutralized before reaching users, preventing any exploitation.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking a malicious link) but is straightforward to exploit once the vulnerable parameter is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.9.9
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'WooCommerce PDF Vouchers'. 4. Click 'Update Now' if available. 5. Alternatively, download version 4.9.9+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patched
wp plugin deactivate woocommerce-pdf-vouchers
Web Application Firewall (WAF) Rules
allConfigure WAF to block XSS payloads targeting the plugin
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use browser security extensions that block XSS attacks
🔍 How to Verify
Check if Vulnerable:
Check plugin version in WordPress admin under Plugins → Installed PluginsCheck Version:
wp plugin get woocommerce-pdf-vouchers --field=versionVerify Fix Applied:
Verify plugin version is 4.9.9 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests containing script tags or JavaScript code
- Multiple failed requests to plugin endpoints with suspicious parameters
Network Indicators:
- HTTP requests with encoded script payloads in query parameters
- Traffic patterns showing users being redirected to external domains
SIEM Query:
source="web_server" AND (uri="*woocommerce-pdf-vouchers*" AND (query="*<script>*" OR query="*javascript:*" OR query="*onload=*"))