What’s Vulnerable › Vulnerabilities

CVE-2026-2996: Advanced Product Fields (Product Addons) for WooCommerce <= 1.6.21 - Unauthenticated Improper Input Validation to Price Bypass via Add-to-Cart POST Request

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-22 · updated 2026-10-12
• Weakness: CWE-20

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.

Affected products

• maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce: through 1.6.21

References

• https://plugins.trac.wordpress.org/browser/advanced-product-fields-for-woocommerce/trunk/includes/controllers/class-product-controller.php#L130
• https://plugins.trac.wordpress.org/changeset/3477476/
• https://plugins.trac.wordpress.org/changeset/3483410/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/5d9c1c3d-6882-4425-8d32-bdb57b4f133d?source=cve

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