CVE-2026-4987— SureForms <= 2.5.2 - Unauthenticated Payment Amount Validation Bypass via 'form_id'
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I. Basic Information for CVE-2026-4987
Vulnerability Information
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Vulnerability Title
SureForms <= 2.5.2 - Unauthenticated Payment Amount Validation Bypass via 'form_id'
Source: NVD (National Vulnerability Database)
Vulnerability Description
The SureForms – Contact Form, Payment Form & Other Custom Form Builder plugin for WordPress is vulnerable to Payment Amount Bypass in all versions up to, and including, 2.5.2. This is due to the create_payment_intent() function performing a payment validation solely based on the value of a user-controlled parameter. This makes it possible for unauthenticated attackers to bypass configured form payment-amount validation and create underpriced payment/subscription intents by setting form_id to 0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
WordPress plugin SureForms 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin SureForms 2.5.2及之前版本存在输入验证错误漏洞，该漏洞源于create_payment_intent函数仅基于用户控制参数进行支付验证，可能导致未经验证的攻击者绕过支付金额验证。
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 |
|---|---|---|---|---|
| brainstormforce | SureForms – Contact Form, Payment Form & Other Custom Form Builder | * ~ 2.5.2 | - |
II. Public POCs for CVE-2026-4987
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|---|
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IV. Related Vulnerabilities
- CVE-2025-14855
SureForms <= 2.2.0 - Unauthenticated Stored Cross-Site Scrip - CVE-2025-12535
SureForms <= 1.13.1 - Cross-Site Request Forgery Protection - CVE-2025-12536
SureForms <= 1.13.1 - Missing Authorization to Unauthenticat - CVE-2025-10732
SureForms – Drag and Drop Form Builder for WordPress <= 1.12 - CVE-2025-10489
SureForms – Drag and Drop Form Builder for WordPress <= 1.12
Same vendor: brainstormforce
- CVE-2026-3534
Astra <= 4.12.3 - Authenticated (Contributor+) Stored Cross- - CVE-2026-0950
Spectra Gutenberg Blocks <= 2.19.17 - Unauthenticated Inform - CVE-2025-14351
Custom Fonts – Host Your Fonts Locally <= 2.1.16 - Missing A - CVE-2025-14855
SureForms <= 2.2.0 - Unauthenticated Stored Cross-Site Scrip - CVE-2025-13065
Starter Templates <= 4.4.41 - Authenticated (Author+) Arbitr
Same weakness: CWE-20
V. Comments for CVE-2026-4987
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