CVE-2024-31283: Advanced Local Pickup Auth Bypass Flaw

CVE-2024-31283 Overview

CVE-2024-31283 is a Missing Authorization vulnerability (CWE-862) affecting the Advanced Local Pickup for WooCommerce plugin developed by zorem. This broken access control flaw allows unauthenticated attackers to perform unauthorized actions within WordPress installations running the vulnerable plugin versions. The vulnerability stems from missing capability checks on critical plugin functions, enabling attackers to bypass intended access restrictions without any authentication.

Critical Impact

This vulnerability allows unauthenticated remote attackers to bypass authorization controls, potentially compromising WooCommerce store configurations, customer data, and overall site integrity without requiring any user interaction.

Affected Products

• zorem Advanced Local Pickup for WooCommerce versions up to and including 1.6.2
• WordPress installations running the vulnerable plugin
• WooCommerce stores utilizing local pickup functionality

Discovery Timeline

• 2024-06-09 - CVE-2024-31283 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-31283

Vulnerability Analysis

This vulnerability represents a Broken Access Control flaw where the Advanced Local Pickup for WooCommerce plugin fails to properly verify user authorization before executing sensitive operations. The missing authorization checks allow any unauthenticated user to access administrative functions that should be restricted to authorized WordPress administrators or shop managers only.

In WordPress plugin development, proper authorization requires implementing capability checks using functions like current_user_can() to verify that the requesting user has appropriate permissions before processing administrative requests. The absence of these checks creates a direct pathway for attackers to manipulate plugin settings, access sensitive store information, or perform other privileged operations.

Root Cause

The root cause of CVE-2024-31283 is the absence of proper authorization verification in the plugin's AJAX handlers and administrative endpoints. When WordPress plugins register AJAX actions or expose REST API endpoints, they must explicitly verify that the requesting user possesses the required capabilities. The vulnerable versions of Advanced Local Pickup for WooCommerce fail to implement these essential checks, allowing requests from unauthenticated users to be processed with elevated privileges.

Attack Vector

The attack vector for this vulnerability is network-based and requires no user interaction or authentication. An attacker can exploit this flaw by sending crafted HTTP requests directly to the vulnerable plugin endpoints. The attack does not require social engineering or any prior access to the target WordPress installation.

Exploitation typically involves:

1. Identifying a WordPress site running the vulnerable plugin version
2. Crafting malicious HTTP requests targeting unprotected AJAX actions or endpoints
3. Submitting these requests to bypass authorization and execute privileged operations
4. Manipulating store settings, accessing configuration data, or performing other unauthorized actions

For detailed technical information about the vulnerability mechanism, refer to the Patchstack Vulnerability Advisory.

Detection Methods for CVE-2024-31283

Indicators of Compromise

• Unexpected modifications to local pickup settings in WooCommerce
• Anomalous AJAX requests to admin-ajax.php with plugin-specific actions from unauthenticated sessions
• Unusual administrative changes without corresponding legitimate admin activity in WordPress audit logs
• Unauthorized access attempts to plugin endpoints from external IP addresses

Detection Strategies

• Monitor WordPress AJAX request logs for unauthenticated calls to Advanced Local Pickup plugin actions
• Implement Web Application Firewall (WAF) rules to detect and block suspicious requests targeting plugin endpoints
• Deploy SentinelOne Singularity for real-time endpoint monitoring and threat detection
• Enable WordPress audit logging to track configuration changes and identify unauthorized modifications

Monitoring Recommendations

• Configure alerts for plugin setting modifications outside of normal administrative hours
• Review web server access logs for patterns of repeated requests to WooCommerce-related AJAX endpoints
• Establish baseline behavior for legitimate plugin usage and flag deviations
• Integrate SentinelOne's behavioral AI detection to identify exploitation attempts in real-time

How to Mitigate CVE-2024-31283

Immediate Actions Required

• Update Advanced Local Pickup for WooCommerce to the latest patched version immediately
• Audit WooCommerce and plugin settings for any unauthorized modifications
• Review WordPress user accounts for any suspicious additions or privilege escalations
• Temporarily disable the plugin if an immediate update is not possible

Patch Information

Organizations should update the Advanced Local Pickup for WooCommerce plugin to a version newer than 1.6.2 that includes proper authorization checks. The patch addresses the missing capability verification by implementing appropriate current_user_can() checks on all sensitive plugin functions and AJAX handlers. For detailed patch information, consult the Patchstack Vulnerability Advisory.

Workarounds

• Deploy a Web Application Firewall (WAF) with rules to block unauthorized access to plugin AJAX endpoints
• Restrict access to wp-admin/admin-ajax.php at the web server level for non-authenticated users where possible
• Implement IP-based access controls to limit administrative endpoint access to trusted networks
• Consider temporarily deactivating the plugin until the patched version can be applied

# Example: Restrict admin-ajax.php access via .htaccess (Apache)
# Note: Test thoroughly as this may impact legitimate plugin functionality
<Files admin-ajax.php>
    <RequireAll>
        Require all granted
    </RequireAll>
</Files>

# Verify installed plugin version via WP-CLI
wp plugin list --name=advanced-local-pickup-for-woocommerce --fields=name,version,status

# Update plugin to latest version
wp plugin update advanced-local-pickup-for-woocommerce