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Vulnerability record · CVE-2026-2996 · published 22 August 2026

CVE-2026-2996: Improper input validation vulnerability

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.

7.5 CVSS 3.1 High EPSS 0.53% · top 57.8% CWE-20 · Improper input validation Deferred
7.5CVSS 3.1 base score
0.53%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
24 Aug 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

LinkTags
https://plugins.trac.wordpress.org/browser/advanced-product-fields-for-woocommerce/trunk/includes/controllers/class-prod
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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Source: NIST National Vulnerability Database (record CVE-2026-2996), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.