CVE-2021-36034 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. An attacker with admin privileges can upload a specially crafted file to achieve remote code execution.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 11/08/2025
This vulnerability resides in Magento Commerce platforms where improper input validation allows for remote code execution through file upload capabilities. The flaw affects versions 2.4.2 and earlier, 2.4.2-p1 and earlier, as well as 2.3.7 and earlier, creating a significant security risk for organizations utilizing these commerce solutions. The vulnerability specifically targets the file upload validation mechanisms within the platform's administrative interface, where attackers with existing administrative privileges can exploit this weakness to execute arbitrary code on the affected system.
The technical implementation of this vulnerability stems from insufficient validation of uploaded files, particularly in the context of administrative user sessions. When an administrator uploads files through the platform's interface, the system fails to properly verify the file type and content, allowing malicious files to bypass security checks. This flaw operates under the CWE-434 category, which addresses "Upload of File without Validation" and represents a critical weakness in input validation processes. The vulnerability enables attackers to upload malicious files such as php shells or web shells that can be executed directly on the server, providing them with persistent access to the compromised system.
The operational impact of this vulnerability extends beyond simple code execution, as it fundamentally compromises the integrity and confidentiality of the entire Magento deployment. Once an attacker successfully exploits this vulnerability, they gain the ability to manipulate the application's behavior, access sensitive customer data, modify product catalogs, and potentially escalate privileges within the system. This represents a severe threat to e-commerce operations, as the compromised system could be used to conduct data breaches, deface websites, or serve as a launching point for further attacks within the organization's network infrastructure. The attack surface is particularly concerning given that Magento platforms often handle sensitive payment information and personal customer data.
Organizations should implement immediate mitigations including upgrading to patched versions of Magento Commerce, which address the input validation flaws in the file upload mechanisms. Network segmentation and strict access controls should be enforced to limit administrative privileges, ensuring that only authorized personnel have access to upload functionalities. Additionally, implementing web application firewalls with rules specifically designed to detect and block suspicious file upload attempts can provide an additional layer of protection. The mitigation strategy should also include monitoring for unusual file upload activities and implementing automated scanning of uploaded files against known malicious signatures. According to ATT&CK framework, this vulnerability maps to T1059.007 for remote code execution and T1566 for social engineering through file uploads, making comprehensive defensive measures essential for protecting against both automated exploitation and targeted attacks.