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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

Quick assessment

Affected
maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce是比利时maartenbelmans个人开发者的一款可为电商产品添加自定义字段和附加选项的插件。 maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce1.6.21及之前版本存在输入验证错误漏洞，该漏洞源于validate_cart_data函数存在逻辑缺陷，导致输入验证不当，可

CVSS 7.5 · High EPSS 0.53% · P45

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce ≤ 1.6.21 affected
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I. Basic Information for CVE-2026-2996

Vulnerability Information
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Vulnerability Title
Advanced Product Fields (Product Addons) for WooCommerce <= 1.6.21 - Unauthenticated Improper Input Validation to Price Bypass via Add-to-Cart POST Request
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce是比利时maartenbelmans个人开发者的一款可为电商产品添加自定义字段和附加选项的插件。 maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce1.6.21及之前版本存在输入验证错误漏洞，该漏洞源于validate_cart_data函数存在逻辑缺陷，导致输入验证不当，可
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
maartenbelmans Advanced Product Fields (Product Addons) for WooCommerce 0 ~ 1.6.21 -

II. Public POCs for CVE-2026-2996

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III. Intelligence Information for CVE-2026-2996

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Patches & Fixes for CVE-2026-2996 (2)

News Coverage for CVE-2026-2996 (1)

IV. Related Vulnerabilities

Same product: Advanced Product Fields (Product Addons) for WooCommerce
Same vendor: maartenbelmans
Same weakness: CWE-20