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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.

WordPress 的 WooCommerce 插件 “Advanced Product Fields (Product Addons)” 在 1.6.21 及以下所有版本中存在不正确的输入验证漏洞。该漏洞源于 “validate_cart_data” 函数中的逻辑缺陷。这使得未经身份验证的攻击者可以绕过必填的付费附加组件，仅以基础产品的价格完成购买，从而通过支付远低于预期总金额的费用窃取商品。该漏洞在 1.6.19 版本中得到部分修补。

CVSS 7.5 · High EPSS 0.53% · P42

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

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

V. Comments for CVE-2026-2996

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