CVE-2026-18143
Received Received - Intake

Arbitrary File Upload in Request a Quote for WooCommerce Plugin

Publication date: 2026-09-26

Last updated on: 2026-09-26

Assigner: Wordfence

Description
The Request a Quote for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.9.2 via the `afrfq_submit_quote_via_popup()` function. This is due to missing file extension and MIME type validation in the popup upload handler, which uses the raw attacker-supplied filename directly as the destination for `move_uploaded_file()`. This makes it possible for unauthenticated attackers to upload executable files, such as PHP files, to a web-accessible temporary RFQ upload directory when a public quote rule with the multi-page popup flow is enabled.

CVSS Scores

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Meta Information

Published
2026-09-26
Last Modified
2026-09-26
Generated
2026-09-26
AI Q&A
2026-09-26
EPSS Evaluated
N/A
NVD
CVE-2026-18143
EUVD
EUVD-2026-87542

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
addify request_a_quote_for_woocommerce to 2.9.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.

Attack-Flow Graph

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Executive Summary

The Request a Quote for WooCommerce plugin for WordPress has an arbitrary file upload vulnerability in versions up to 2.9.2. The issue is in the popup upload handler function, which lacks proper file extension and MIME type validation. Attackers can exploit this to upload executable files like PHP directly to a web-accessible directory by using a public quote rule with the multi-page popup flow enabled.

Detection Guidance

Check for unexpected PHP or executable files in the WooCommerce RFQ upload directory, typically located in wp-content/uploads/quote-uploads. Review server access logs for POST requests to /wp-admin/admin-ajax.php with parameters related to quote uploads.

Impact Analysis

This vulnerability allows unauthenticated attackers to upload malicious files to your server. If exploited, it could lead to remote code execution, website defacement, data theft, or complete server compromise. The high CVSS score of 9.8 indicates severe potential impact on confidentiality, integrity, and availability.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA requirements for data protection and access controls. A successful exploit may result in data breaches, triggering mandatory breach notifications and potential fines under these regulations.

Mitigation Strategies

Immediately update the Request a Quote for WooCommerce plugin to the latest version. Disable public quote rules with multi-page popup flow if an update is not available. Restrict write permissions on the upload directory and monitor for unauthorized file uploads.

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