CVE-2022-4328 in WooCommerce Checkout Field Manager Plugin
Summary
by MITRE • 03/06/2023
The WooCommerce Checkout Field Manager WordPress plugin before 18.0 does not validate files to be uploaded, which could allow unauthenticated attackers to upload arbitrary files such as PHP on the server
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Analysis
by VulDB Data Team • 03/16/2023
The vulnerability identified as CVE-2022-4328 affects the WooCommerce Checkout Field Manager WordPress plugin version 18.0 and earlier, representing a critical security flaw that undermines the integrity of WordPress-based e-commerce platforms. This issue stems from insufficient input validation mechanisms within the plugin's file upload functionality, creating an avenue for malicious actors to exploit the system without requiring authentication credentials. The vulnerability exists in the plugin's handling of user-uploaded files, specifically within the checkout field management features that allow administrators to customize form elements during the purchasing process.
The technical flaw manifests as a lack of proper file validation and sanitization processes that should occur during file upload operations. Attackers can leverage this weakness to upload malicious files, including PHP scripts, to the target server. This vulnerability directly maps to CWE-434, which describes the insecure upload of executable files, and aligns with ATT&CK technique T1190, which covers the exploitation of vulnerabilities in web applications to gain unauthorized access. The absence of file type checking, content validation, and proper sanitization allows attackers to bypass security controls designed to prevent the execution of potentially harmful code on the server.
The operational impact of this vulnerability is severe and multifaceted, potentially enabling attackers to achieve full system compromise through the execution of arbitrary code. Once an attacker successfully uploads a malicious PHP file, they can execute commands on the server, potentially leading to data theft, service disruption, or the establishment of persistent backdoors. The vulnerability affects WordPress installations that rely on the affected plugin, making it particularly dangerous in environments where multiple e-commerce sites operate on shared infrastructure. The unauthenticated nature of the attack means that any visitor to the website could potentially exploit this vulnerability, significantly expanding the attack surface.
Mitigation strategies should focus on immediate remediation through plugin updates to version 18.0 or later, which address the file validation deficiencies. Organizations should also implement additional security measures including the restriction of file upload capabilities, implementation of proper file type validation, and the use of web application firewalls to monitor and filter suspicious upload attempts. Security hardening practices such as restricting file permissions, implementing proper access controls, and conducting regular security audits of installed plugins should be enforced. The vulnerability highlights the importance of maintaining up-to-date third-party components and demonstrates how seemingly minor flaws in plugin functionality can result in critical system compromise, emphasizing the need for comprehensive security testing and validation of all components within WordPress ecosystems.