CVE-2026-19089 in Product Input Fields for WooCommerce Plugin
Summary
by MITRE • 08/10/2026
The Product Input Fields for WooCommerce WordPress plugin before 2.0.2 does not validate uploaded file types when its accepted-types setting is left empty, which its own documentation advertises as accepting all files, allowing unauthenticated attackers to upload arbitrary files and achieve remote code execution on servers that do not honour the directory's access rules.
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Analysis
by VulDB Data Team • 08/10/2026
The vulnerability in the Product Input Fields for WooCommerce WordPress plugin affects versions prior to 2.0.2 and represents a critical security flaw that stems from inadequate input validation mechanisms. This weakness specifically manifests when administrators leave the accepted-types setting empty, a configuration that the plugin documentation explicitly states should accept all file types. The absence of proper file type validation creates an exploitable condition where attackers can bypass intended security restrictions and upload malicious files to vulnerable WordPress installations.
The technical implementation of this vulnerability involves a fundamental failure in the plugin's file upload processing logic. When the accepted-types parameter remains unset, the plugin fails to enforce any restrictions on file extensions or content types, creating a path for arbitrary file uploads. This validation gap directly maps to CWE-434 which describes "Unrestricted Upload of File with Dangerous Type" and represents a well-established pattern in web application security where insufficient input sanitization leads to privilege escalation and code execution capabilities. The vulnerability operates at the application layer and demonstrates how default configurations can inadvertently create security holes when documentation and implementation diverge.
From an operational perspective, this vulnerability enables unauthenticated remote code execution attacks against affected systems, representing a severe threat to WordPress installations that rely on the Product Input Fields plugin. Attackers can upload malicious files such as php shells, webshells, or other exploit payloads that can then be executed on the target server. The impact extends beyond simple file uploads since many servers do not properly enforce directory access controls or execute file permissions, allowing uploaded content to be directly accessed and executed through web requests. This creates a direct path for attackers to gain persistent access to compromised systems, potentially leading to full system compromise or data exfiltration.
The attack surface for this vulnerability is particularly concerning given the widespread adoption of WooCommerce and its associated plugins within the WordPress ecosystem. Any unauthenticated attacker with knowledge of the vulnerable plugin can exploit this flaw without requiring prior authentication credentials or elevated privileges. The security implications are further exacerbated by the fact that many WordPress installations operate in environments where directory access restrictions are not properly configured, or where file permissions do not prevent execution of uploaded content. Organizations should consider this vulnerability in relation to ATT&CK technique T1190 which describes "Exploit Public-Facing Application" and T1059 which covers "Command and Scripting Interpreter" as attackers can leverage the uploaded files to execute arbitrary commands on compromised systems.
Mitigation strategies for this vulnerability require immediate action including updating to version 2.0.2 or later where the file validation has been properly implemented. Administrators should also conduct thorough security audits of their WordPress installations to identify any other plugins that may exhibit similar validation flaws. Additional protective measures include implementing proper file upload restrictions at the web server level, configuring directory permissions to prevent execution of uploaded files, and establishing monitoring systems to detect unusual file upload activities. The vulnerability highlights the critical importance of proper input validation and demonstrates how seemingly benign documentation can create security risks when implementation does not align with stated capabilities. Organizations should also consider implementing Web Application Firewalls and runtime application self-protection mechanisms to provide additional layers of defense against similar exploitation patterns.