CVE-2024-9944
📋 TL;DR
The WooCommerce WordPress plugin up to version 9.0.2 is vulnerable to HTML injection via order forms. Unauthenticated attackers can inject malicious HTML that executes when administrators view order submissions, potentially leading to cross-site scripting attacks. All WordPress sites using vulnerable WooCommerce versions are affected.
💻 Affected Systems
- WooCommerce WordPress plugin
📦 What is this software?
Woocommerce by Woocommerce
⚠️ Risk & Real-World Impact
Worst Case
Attackers could inject malicious scripts that steal administrator session cookies, redirect to phishing sites, or perform actions as the administrator when they view order submissions.
Likely Case
Attackers inject phishing forms or malicious links that trick administrators into revealing credentials or downloading malware.
If Mitigated
With proper input validation and output escaping, injected HTML would be displayed as plain text without execution.
🎯 Exploit Status
Exploitation requires no authentication and minimal technical skill. Attackers simply submit malicious HTML through order forms.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.0.3
Vendor Advisory: https://github.com/woocommerce/woocommerce/pull/49370
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find WooCommerce and click 'Update Now'. 4. Verify version is 9.0.3 or higher.
🔧 Temporary Workarounds
Input Validation Filter
allAdd custom PHP filter to sanitize order form submissions before processing.
Add to theme's functions.php: add_filter('woocommerce_process_checkout_field', 'sanitize_order_fields'); function sanitize_order_fields($value) { return wp_kses_post($value); }
🧯 If You Can't Patch
- Temporarily disable WooCommerce order forms or restrict access to authenticated users only.
- Implement web application firewall (WAF) rules to block HTML injection patterns in form submissions.
🔍 How to Verify
Check if Vulnerable:
Check WooCommerce version in WordPress admin under Plugins > Installed Plugins. If version is 9.0.2 or lower, you are vulnerable.Check Version:
wp plugin list --name=woocommerce --field=versionVerify Fix Applied:
After updating, verify WooCommerce version is 9.0.3 or higher. Test order form submission with HTML tags - they should display as plain text.📡 Detection & Monitoring
Log Indicators:
- Unusual HTML/script tags in WooCommerce order submission logs
- Multiple failed order submissions with similar patterns
Network Indicators:
- HTTP POST requests to checkout endpoints containing script tags or malicious HTML
SIEM Query:
source="wordpress.log" AND "woocommerce" AND "checkout" AND ("<script>" OR "javascript:" OR "onclick=")🔗 References
- https://github.com/woocommerce/woocommerce/pull/49370
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3115837%40woocommerce%2Ftrunk&old=3106873%40woocommerce%2Ftrunk&sfp_email=&sfph_mail=
- https://raw.githubusercontent.com/woocommerce/woocommerce/trunk/changelog.txt
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b5dfe2a5-612f-4e6c-a639-4afcff2ffa4c?source=cve
