Advanced Product Fields lets buyers bypass required paid add-ons
Advanced Product Fields for WooCommerce through 1.6.21 contains an input-validation logic flaw in validate_cart_data(). An unauthenticated buyer can omit required paid add-ons and complete checkout at the base product price rather than the intended total. Version 1.6.19 only partially addressed the issue.
- Component
- Advanced Product Fields (Product Addons) for WooCommerce
- Plugin slug
advanced-product-fields-for-woocommerce- Affected
- <= 1.6.21
- Safe version
- See mitigation notes
- Published
- Aug 22, 2026
This CVE was published Aug 22, 2026 and is one of 3 known issues for this plugin.
Update, patch or deactivate.
No complete fixed release is identified for CVE-2026-2996. Update when a release after 1.6.21 is confirmed to fix the issue; until then, disable affected paid add-ons or the plugin when warranted and reconcile product configurations, orders and captured totals.
No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical 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.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N