CVE-2023-45384 in supercheckout
Summary
by MITRE • 10/25/2023
KnowBand supercheckout > 5.0.7 and < 6.0.7 is vulnerable to Unrestricted Upload of File with Dangerous Type. In the module "Module One Page Checkout, Social Login & Mailchimp" (supercheckout), a guest can upload files with extensions .php
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Analysis
by VulDB Data Team • 02/09/2026
The vulnerability identified as CVE-2023-45384 affects the KnowBand supercheckout module version 5.0.7 through 6.0.6, representing a critical security flaw in e-commerce platforms that utilize this checkout solution. This issue manifests as an unrestricted file upload vulnerability that allows malicious actors to bypass normal file validation mechanisms and upload potentially harmful files with dangerous extensions. The affected module, specifically the "One Page Checkout, Social Login & Mailchimp" component, creates an attack surface where unauthorized file uploads can occur without proper security controls.
The technical implementation flaw stems from inadequate input validation and sanitization within the file upload functionality of the supercheckout module. When a guest user attempts to upload files through the checkout process, the system fails to properly validate the file extensions and content types, allowing uploads of files with .php extensions. This represents a classic security misconfiguration that violates fundamental principles of secure file handling and input validation. The vulnerability is categorized under CWE-434, which specifically addresses unrestricted upload of file with dangerous type, a well-documented weakness in web applications.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with potential persistent access to the target system. Successful exploitation could enable remote code execution, allowing threat actors to execute malicious code on the web server, potentially leading to complete system compromise. The .php file upload capability creates a direct pathway for attackers to deploy web shells, backdoors, or other malicious payloads that can be executed within the web server context. This vulnerability aligns with ATT&CK technique T1505.003, which covers server-side source code injection, and represents a significant risk to the confidentiality, integrity, and availability of the affected e-commerce platform.
Organizations running vulnerable versions of the KnowBand supercheckout module face immediate security risks including data breaches, unauthorized access to customer information, and potential compromise of the entire web infrastructure. The vulnerability's persistence stems from the fact that uploaded files are typically stored in publicly accessible directories, making them easily exploitable. Attackers can leverage this flaw to establish persistent access, exfiltrate sensitive data, or use the compromised system as a launchpad for further attacks within the network. The impact extends beyond simple file uploads as it can facilitate privilege escalation, lateral movement, and long-term persistence within the target environment. Mitigation strategies should include immediate patching to versions 6.0.7 or later, implementing strict file type validation, restricting file upload directories, and conducting comprehensive security assessments of all installed modules.