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.
[POC] CVE-2026-18143 — CVE-2026-18143
Unauthenticated arbitrary file upload in Addify Request a Quote for WooCommerce ≤ 2.9.2 via public AJAX afrfq_submit_quote_via_popup — unsafe move_uploaded_file() with attacker-controlled .php filenames into web-accessible RFQ temp storage (popup quote flow required). CVSS 9.8. Python check/exploit PoC → pocbit.org/pocs/cve-2026-18143
PoC: CVE-2026-18143
single PoC for CVE-2026-18143 Unauth AFU (Arbitrary File Upload)
PoC: CVE-2026-18143
Request a Quote for WooCommerce (Addify) <= 2.9.2 Unauthenticated arbitrary file upload via afrfq_submit_quote_via_popup
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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