CVE-2026-92428 in Rede Itaú for WooCommerce Plugin
Summary
by MITRE • 10/15/2026
The Rede Itaú for WooCommerce WordPress plugin before 5.5.3 does not verify the authenticity of a payment gateway webhook before updating an order's status, allowing unauthenticated attackers to change the status of arbitrary WooCommerce orders, including orders that were already paid or completed.
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Analysis
by VulDB Data Team • 10/15/2026
The vulnerability identified in Rede Itaú for WooCommerce versions prior to 5.5.3 represents a critical failure in input validation and authentication mechanisms within the payment gateway integration logic. This WordPress plugin facilitates transactions through the Brazilian banking institution's payment infrastructure, but it fails to implement proper cryptographic verification or signature checks on incoming webhook requests from the payment provider. Webhooks are automated messages sent by applications based on events that occur, such as a successful transaction, and they often trigger state changes in e-commerce platforms like WooCommerce. In this specific implementation, the plugin accepts these webhook payloads without verifying their origin or integrity, effectively treating any HTTP POST request claiming to be from the payment gateway as legitimate. This architectural oversight allows unauthenticated attackers to craft malicious requests that mimic valid webhook structures, thereby bypassing security controls entirely.
From a technical perspective, the core flaw lies in the absence of signature verification for incoming API callbacks. Secure integrations typically utilize shared secrets or public key cryptography to sign payloads sent by third-party services like payment gateways. The receiving application must then verify this signature before processing any data that affects business logic, such as order status updates. By omitting this step, the plugin exposes a direct path for manipulation of database records associated with customer orders. An attacker can send crafted HTTP requests to the specific webhook endpoint exposed by the WordPress site, injecting parameters that instruct WooCommerce to update an order's status from pending or processing to completed or paid. This action does not require any valid credentials or session tokens, making it a straightforward exploitation vector for remote attackers who have network access to the web server hosting the vulnerable plugin.
The operational impact of this vulnerability is severe and directly affects financial integrity and inventory management within e-commerce environments. By manipulating order statuses without actual payment verification, attackers can force orders into completed states, which may trigger automatic fulfillment processes such as shipping notifications or digital license deliveries. This results in significant revenue loss for merchants who ship goods or provide services without receiving corresponding funds. Furthermore, this manipulation distorts sales analytics and inventory tracking systems that rely on accurate order status data to manage stock levels and generate financial reports. The ability to alter arbitrary orders means that attackers can target specific high-value transactions or systematically manipulate multiple records, leading to substantial economic damage and potential reputational harm for the affected businesses.
This vulnerability aligns with Common Weakness Enumeration (CWE) standards, specifically CWE-347 which describes Improper Verification of Cryptographic Signature, as well as CWE-287 regarding Improper Authentication where an actor is able to bypass authentication mechanisms. In terms of offensive security frameworks, this behavior maps directly to the MITRE ATT&CK technique T1505.003 for Server Software Component: Web Shell or Backdoor if used persistently, but more accurately fits within data manipulation tactics often associated with post-exploitation activities where an attacker modifies stored information to achieve their objectives without detection through standard authentication logs. The lack of integrity checks on external inputs is a classic example of trusting unverified sources in web application development.
To mitigate this vulnerability, administrators must immediately upgrade the Rede Itaú for WooCommerce plugin to version 5.5.3 or later where these security controls have been implemented. If upgrading is not immediately possible, temporary mitigations include restricting access to the webhook endpoint via IP allowlisting if the payment gateway's server IPs are static and known, although this method is less robust than cryptographic verification. Additionally, implementing a Web Application Firewall (WAF) with rules that detect anomalous patterns in POST requests targeting WooCommerce endpoints can provide an additional layer of defense. It is also crucial to audit existing order logs for any signs of unauthorized status changes during the period when the vulnerability was present, ensuring no fraudulent transactions were processed or goods shipped without payment. Regular security assessments and adherence to secure coding practices that mandate verification of all external inputs are essential to prevent similar issues in future integrations.