CVE-2025-4403 in Drag and Drop Multiple File Upload for WooCommerce Plugin
Summary
by MITRE • 05/09/2025
The Drag and Drop Multiple File Upload for WooCommerce plugin for WordPress is vulnerable to arbitrary file uploads in all versions up to, and including, 1.1.6 due to accepting a user‐supplied supported_type string and the uploaded filename without enforcing real extension or MIME checks within the upload() function. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
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Analysis
by VulDB Data Team • 05/12/2026
The vulnerability in the Drag and Drop Multiple File Upload for WooCommerce plugin represents a critical security flaw that undermines the integrity of WordPress-based e-commerce platforms. This weakness exists within the plugin's upload() function where the system fails to properly validate file extensions and MIME types before processing uploaded files. The vulnerability affects all versions up to and including 1.1.6, making it a widespread concern for WordPress administrators who have not yet updated their installations. The flaw stems from the plugin's trust in user-supplied data without implementing proper sanitization measures, creating an attack surface that unauthenticated malicious actors can exploit to gain unauthorized access to the server infrastructure.
The technical implementation of this vulnerability allows attackers to bypass standard file validation mechanisms by manipulating the supported_type parameter and filename attributes during the upload process. When the plugin processes these user-controlled inputs without proper validation, it accepts files with extensions that should be restricted, potentially permitting the upload of executable scripts or malicious payloads. This weakness directly maps to CWE-434 which defines the vulnerability of web applications accepting untrusted data without proper validation, and aligns with ATT&CK technique T1190 which describes the exploitation of vulnerabilities to gain access to systems through web application attacks. The absence of real extension or MIME checks creates a pathway for attackers to upload files with dangerous extensions such as .php, .jsp, or .asp that could be executed on the web server, potentially leading to complete system compromise.
The operational impact of this vulnerability extends beyond simple file upload capabilities and represents a significant threat to the overall security posture of affected WordPress installations. Unauthenticated attackers can leverage this flaw to upload malicious files that may contain backdoors, web shells, or other exploit payloads that could enable persistent access to the compromised system. The vulnerability creates an opportunity for attackers to establish a foothold within the network, potentially leading to data exfiltration, service disruption, or further lateral movement within the organization's infrastructure. This type of arbitrary file upload vulnerability is particularly dangerous in e-commerce environments where sensitive customer data, payment information, and business-critical operations are handled, making the potential damage from exploitation substantial and far-reaching.
Organizations should immediately implement mitigations to protect against exploitation of this vulnerability while planning for comprehensive remediation through plugin updates. The most effective immediate measure involves implementing strict file type validation at the web server level, ensuring that only legitimate file extensions are accepted for upload and that MIME type verification occurs before file processing. Administrators should also consider implementing web application firewalls that can detect and block suspicious upload patterns, along with monitoring for unauthorized file uploads in the system logs. The recommended long-term solution requires updating the affected plugin to version 1.1.7 or later, which includes proper validation mechanisms that enforce real extension and MIME type checks within the upload() function. Additionally, implementing principle of least privilege access controls and regular security audits of installed plugins can help prevent similar vulnerabilities from being exploited in the future, aligning with security best practices outlined in NIST SP 800-53 and ISO/IEC 27001 frameworks.