Vulnerability 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 Score
CRITICAL
Related Weaknesses (CWE)
References
- https://woocommerce.com/products/request-a-quote-plugin-for-woocommerce/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/3417ec27-6abf-45c7-945
FAQ
What is CVE-2026-18143?
CVE-2026-18143 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 d...
How severe is CVE-2026-18143?
CVE-2026-18143 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-18143?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.