Essential WooCommerce Security Best Practices

Introduction

Security is paramount for any e-commerce store. Here are essential security measures every WooCommerce store should implement.

1. Authentication Security

function enhance_login_security() {
    // Implement login attempt limiting
    add_filter('authenticate', function($user, $username, $password) {
        if (!empty($username)) {
            $ip = $_SERVER['REMOTE_ADDR'];
            $attempts = get_transient('login_attempts_' . $ip) ?: 0;
            
            if ($attempts > 5) {
                return new WP_Error(
                    'too_many_attempts',
                    'Too many failed login attempts. Please try again later.'
                );
            }
            
            if (null === $user) {
                set_transient(
                    'login_attempts_' . $ip,
                    ++$attempts,
                    HOUR_IN_SECONDS
                );
            }
        }
        return $user;
    }, 30, 3);
    
    // Implement 2FA
    add_action('wp_login', function($user_login, $user) {
        if (user_can($user, 'manage_woocommerce')) {
            require_once '2fa-verification.php';
        }
    }, 10, 2);
}

2. Data Protection

function implement_data_protection() {
    // Encrypt sensitive data
    function encrypt_sensitive_data($data) {
        if (!defined('ENCRYPTION_KEY')) {
            define('ENCRYPTION_KEY', get_option('encryption_key'));
        }
        
        $cipher = "aes-256-cbc";
        $ivlen = openssl_cipher_iv_length($cipher);
        $iv = openssl_random_pseudo_bytes($ivlen);
        
        $encrypted = openssl_encrypt(
            $data,
            $cipher,
            ENCRYPTION_KEY,
            0,
            $iv
        );
        
        return base64_encode($iv . $encrypted);
    }
    
    // Implement PCI compliance measures
    add_filter('woocommerce_payment_fields', function($fields) {
        foreach ($fields as &$field) {
            if (in_array($field['id'], ['card-number', 'card-cvc'])) {
                $field['class'][] = 'encrypt-field';
                $field['custom_attributes']['autocomplete'] = 'off';
            }
        }
        return $fields;
    });
}