CVE-2021-36038 in Magento Commerce
Summary
by MITRE • 09/01/2021
Magento Commerce versions 2.4.2 (and earlier), 2.4.2-p1 (and earlier) and 2.3.7 (and earlier) are affected by an improper input validation vulnerability in the Multishipping Module. An authenticated attacker could leverage this vulnerability to achieve sensitive information disclosure.
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Analysis
by VulDB Data Team • 11/08/2025
The vulnerability identified as CVE-2021-36038 affects Magento Commerce platforms across multiple version ranges including 2.4.2 and earlier, 2.4.2-p1 and earlier, and 2.3.7 and earlier. This issue resides within the Multishipping Module which handles complex checkout processes involving multiple shipping addresses. The vulnerability stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data during the multishipping checkout flow. This flaw represents a critical security weakness that directly impacts the platform's ability to maintain data integrity and protect sensitive information from unauthorized access.
The technical implementation of this vulnerability occurs when an authenticated user submits malformed input through the multishipping checkout process. The insufficient validation allows attackers to manipulate input parameters in ways that bypass normal security controls, potentially exposing sensitive data such as customer information, order details, or system configuration data. This type of vulnerability maps to CWE-20, which describes improper input validation, and specifically relates to CWE-200, which deals with information exposure. The flaw operates at the application layer where user input transitions from the frontend interface to backend processing without adequate sanitization or verification of data integrity.
From an operational perspective, this vulnerability creates significant risk for Magento deployments as it requires only authenticated access to exploit, meaning that attackers who have obtained valid user credentials can leverage this weakness. The impact extends beyond simple information disclosure to potentially enable more sophisticated attacks including privilege escalation or further exploitation of related vulnerabilities. The multishipping functionality is commonly used in enterprise environments where customers may have multiple shipping addresses for business purposes, making this attack vector particularly relevant for organizations handling sensitive commercial data. This vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and T1005 which covers data from local system.
Organizations should prioritize immediate remediation by upgrading to patched versions of Magento Commerce that address this input validation weakness in the Multishipping Module. The recommended mitigation strategy involves implementing comprehensive input validation controls including parameterized queries, strict data type checking, and regular security audits of all user-facing modules. Additional protective measures include enhanced monitoring of checkout processes, implementation of web application firewalls, and regular penetration testing to identify similar validation flaws. Security teams should also consider implementing principle of least privilege access controls for checkout functionalities and establish automated vulnerability scanning processes to detect similar issues in custom modules or third-party extensions that may interact with the multishipping functionality.