CVE-2024-50448
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages viewed by other users through improper input sanitization in the YITH WooCommerce Product Add-Ons WordPress plugin. It affects all WordPress sites using this plugin up to version 4.14.1. Attackers can execute arbitrary JavaScript in victims' browsers when they visit specially crafted URLs.
💻 Affected Systems
- YITH WooCommerce Product Add-Ons WordPress Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on visitors' systems.
Likely Case
Session hijacking, credential theft, defacement of affected pages, or redirection to phishing sites.
If Mitigated
Limited impact with proper Content Security Policy (CSP) headers and input validation at the web application firewall level.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking malicious link) but is straightforward to exploit once the vulnerable parameter is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.14.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find YITH WooCommerce Product Add-Ons. 4. Click 'Update Now' if update is available. 5. Alternatively, download version 4.14.2+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allConfigure WAF to block XSS payloads targeting the vulnerable plugin parameters.
Content Security Policy (CSP)
allImplement strict CSP headers to prevent execution of inline scripts and unauthorized script sources.
Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Header set X-Content-Type-Options "nosniff"
Header set X-Frame-Options "SAMEORIGIN"
🧯 If You Can't Patch
- Disable the YITH WooCommerce Product Add-Ons plugin if not essential for site functionality.
- Implement network-level filtering to block malicious requests containing XSS payloads targeting the plugin.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > YITH WooCommerce Product Add-Ons. If version is 4.14.1 or lower, you are vulnerable.Check Version:
wp plugin get yith-woocommerce-product-add-ons --field=versionVerify Fix Applied:
After updating, verify the plugin version shows 4.14.2 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing script tags or JavaScript payloads in query parameters related to the plugin
- Unusual parameter values in URLs containing angle brackets, JavaScript functions, or encoded payloads
Network Indicators:
- HTTP requests with suspicious parameters like <script>, javascript:, or encoded equivalents in query strings
SIEM Query:
source="web_server_logs" AND (uri="*yith-woocommerce-product-add-ons*" AND (query="*<script>*" OR query="*javascript:*" OR query="*%3Cscript%3E*"))