Advanced Product Fields (Product Addons) for WooCommerce <= 1.6.21 - Unauthenticated Improper Input Validation to Price Bypass via Add-to-Cart POST Request

7.5
Improper Input Validation
CVE CVE-2026-2996
CVSS 7.5 (High)
Publicly Published August 21, 2026
Last Updated August 22, 2026
Researcher Andrés Cruciani

Description

The Advanced Product Fields (Product Addons) for WooCommerce plugin for WordPress is vulnerable to Improper Input Validation in all versions up to, and including, 1.6.21. This is due to a logic flaw in the 'validate_cart_data' function. This makes it possible for unauthenticated attackers to bypass required paid addons and complete purchases at the base product price only, effectively stealing products by paying a fraction of the intended total. The vulnerability was partially patched in version 1.6.19.

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Vulnerability Details for Advanced Product Fields (Product Addons) for WooCommerce

Software Type Plugin
Software Slug advanced-product-fields-for-woocommerce (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.6.22, or a newer patched version
Affected Version
  • <= 1.6.21
Patched Version
  • 1.6.22

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