External risk intelligence

WooCommerce Plugin Arbitrary File Upload Leading to Remote Code Execution.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-19089

The vulnerability affects a WooCommerce plugin, which is a component of a public-facing web application. E-commerce storefronts and their associated input fields are designed to be internet-accessible, making this surface commonly exposed in standard web deployments.

Unrestricted File Upload

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical security issue has been identified in a popular e-commerce plugin for WordPress. This vulnerability could allow unauthorized individuals to upload malicious files to servers, potentially leading to the execution of arbitrary code. The main concern at this time is to confirm if this specific plugin is in use and exposed.

Unrestricted file uploads can lead to server compromise.
Affects widely used e-commerce platform component.
Confirm relevance and exposure if using the plugin.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker can leverage the WooCommerce Product Input Fields plugin's failure to validate file types when the accepted-types setting is empty. By uploading an arbitrary file, the attacker could achieve remote code execution, provided the server's directory access rules are not strictly enforced.

No authentication required.
Uploading a file to an input field.
Remote code execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability in the WooCommerce Product Input Fields plugin could allow unauthenticated attackers to upload arbitrary files. If server access rules are not properly configured, this could lead to remote code execution.

Arbitrary file uploads.
Uploading malicious files to server.
Server compromise via remote code execution.

Operational Fix

Recommended remediation, mitigation, and detection steps

The WooCommerce WordPress plugin's improper file type validation impacts organizations running e-commerce sites. Application owners and infrastructure teams are likely responsible for addressing this, starting with identifying all instances of the plugin, assessing their exposure and business criticality, and confirming accountable ownership before planning remediation.

Application owners should manage the issue.
Verify plugin reachability and criticality first.
Plan remediation based on confirmed risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the Product Input Fields for WooCommerce plugin?

This WordPress plugin adds customizable fields to e-commerce product pages, allowing customers to provide extra information during the buying process. It functions as an extension to the WooCommerce platform, which powers online storefronts by managing inventory, shopping carts, and checkout flows.

What does CWE-434 mean regarding CVE-2026-19089?

CWE-434 refers to Unrestricted Upload of File with Dangerous Type. In the context of CVE-2026-19089, the plugin fails to check what kind of files are being uploaded when the accepted-types configuration is empty. Because the software does not restrict the upload process, it permits files that could contain malicious instructions to be saved directly to the server.

How does an attacker trigger this vulnerability?

An attacker triggers this by interacting with the plugin's file upload feature without needing to log in. The vulnerability manifests specifically when the 'accepted-types' setting is left empty, as the plugin then treats all file types as valid. It does not trigger if the plugin is configured with a restricted list of allowed file extensions.

Is my site relevant to this vulnerability?

According to Halo Surface Signal, this vulnerability is considered highly relevant because the affected plugin is part of a public-facing e-commerce storefront. Since online shops must be accessible to customers on the internet to function, the input fields are naturally exposed to anyone visiting the site.

How should I respond to this threat?

Start by identifying all WordPress installations where this specific plugin is active. Once located, verify the current 'accepted-types' configuration setting. Prioritize updating the plugin to a version beyond 2.0.2 to gain proper file validation, and review your server's directory access rules to ensure it does not execute uploaded files unexpectedly.

References

wpscan.com/vulnerability/c5728a31-de92-40df-ab19-aec4db84ba21/

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.