CVE-2023-34000: WooCommerce Stripe Gateway IDOR Vulnerability

CVE-2023-34000 Overview

CVE-2023-34000 is an unauthenticated Insecure Direct Object Reference (IDOR) vulnerability affecting the WooCommerce Stripe Payment Gateway plugin for WordPress. This vulnerability allows attackers to access and disclose sensitive Personally Identifiable Information (PII) without authentication in plugin versions 7.4.0 and earlier. The flaw stems from improper authorization checks when handling order data, enabling malicious actors to enumerate and retrieve customer information from WooCommerce orders.

Critical Impact

Unauthenticated attackers can exploit this IDOR vulnerability to access customer PII including names, addresses, email addresses, and potentially payment-related metadata from WooCommerce orders, posing significant privacy and compliance risks.

Affected Products

• WooCommerce Stripe Payment Gateway plugin versions ≤ 7.4.0
• WordPress installations running vulnerable plugin versions
• E-commerce sites processing payments through the affected plugin

Discovery Timeline

• June 14, 2023 - CVE-2023-34000 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2023-34000

Vulnerability Analysis

This vulnerability is classified as CWE-639: Authorization Bypass Through User-Controlled Key, commonly known as Insecure Direct Object Reference (IDOR). The WooCommerce Stripe Payment Gateway plugin fails to properly validate user authorization when processing requests for order information.

The vulnerability allows unauthenticated users to access order data by manipulating object references, bypassing the intended access controls. Since the plugin handles payment gateway functionality, it has access to sensitive customer data including billing addresses, email addresses, and order details. The network-based attack vector requires no user interaction and can be exploited with low complexity, making it particularly dangerous for exposed e-commerce installations.

Root Cause

The root cause of CVE-2023-34000 lies in missing or insufficient authorization checks within the plugin's order handling functionality. When processing requests related to order data, the plugin fails to verify whether the requesting user has legitimate access to the specific order being referenced. This allows attackers to iterate through order IDs or manipulate request parameters to access arbitrary order information belonging to other customers.

Attack Vector

The attack can be executed remotely over the network without authentication. An attacker targets WordPress sites running vulnerable versions of the WooCommerce Stripe Payment Gateway plugin by crafting requests that reference order identifiers. Due to the lack of proper authorization validation, the plugin returns order data regardless of whether the requester has legitimate access to that information.

The exploitation process involves identifying endpoints that handle order data, then systematically querying different order IDs to extract customer PII. This could include customer names, billing and shipping addresses, email addresses, phone numbers, and order metadata. The attack requires no privileges or user interaction, making it trivially exploitable at scale against vulnerable installations.

Detection Methods for CVE-2023-34000

Indicators of Compromise

• Unusual patterns of requests to WooCommerce order-related endpoints from single IP addresses
• Sequential or enumerated order ID access attempts in web server logs
• Spike in API calls to Stripe payment gateway integration endpoints
• Access attempts to order data from unauthenticated sessions

Detection Strategies

• Monitor web application firewall (WAF) logs for suspicious enumeration patterns targeting order endpoints
• Implement rate limiting on order-related API endpoints to detect and block enumeration attempts
• Review access logs for requests accessing multiple order IDs from unauthenticated sources
• Deploy intrusion detection rules to identify IDOR exploitation patterns

Monitoring Recommendations

• Enable detailed logging for WooCommerce order access and Stripe payment gateway interactions
• Configure alerts for unusual volumes of order data requests from single sources
• Implement user behavior analytics to detect anomalous access patterns to customer data
• Regularly audit access logs for signs of data exfiltration or enumeration activities

How to Mitigate CVE-2023-34000

Immediate Actions Required

• Update WooCommerce Stripe Payment Gateway plugin to version 7.4.1 or later immediately
• Audit access logs to determine if the vulnerability has been exploited against your installation
• Review any potential data exposure and assess GDPR or PCI-DSS compliance implications
• Consider temporarily disabling the plugin if immediate patching is not possible

Patch Information

The vulnerability has been addressed in WooCommerce Stripe Payment Gateway plugin versions after 7.4.0. Site administrators should update to the latest available version through the WordPress plugin repository. The patch implements proper authorization checks to ensure users can only access order data they are authorized to view.

For detailed vulnerability information and remediation guidance, refer to the Patchstack article on this IDOR vulnerability and the Patchstack vulnerability database entry.

Workarounds

• Implement a Web Application Firewall (WAF) with rules to detect and block IDOR exploitation attempts
• Restrict access to WordPress admin and WooCommerce endpoints at the network level where possible
• Enable WordPress security plugins that provide additional access control layers
• Monitor and rate-limit requests to order-related endpoints until patching can be completed

# Example: Restrict access to WooCommerce AJAX endpoints via .htaccess (temporary mitigation)
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} ^.*wp-admin/admin-ajax\.php.*$ [NC]
RewriteCond %{QUERY_STRING} action=.*wc_stripe.* [NC]
RewriteCond %{HTTP_COOKIE} !wordpress_logged_in [NC]
RewriteRule .* - [F,L]
</IfModule>