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CVE-2026-18406— SureForms <= 2.12.2 - Unauthenticated Stored Cross-Site Scripting via Text Field Entity-Encoded Payload

Quick assessment

Affected
brainstormforce SureForms – Contact Form Builder, AI Forms, Payment Form, Survey & Quiz
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 SureForms是WordPress基金会的一款高级在线表单构建插件。 WordPress SureForms 2.12.2及之前版本存在跨站脚本漏洞，该漏洞源于通过文本字段实体编码有效载荷时输入清理和输出转义不足，可能导致存储型跨站脚本攻击，未经身份验证的攻击者可在页面中注入任意Web脚本，当用户访问被注入的页面时执行这些脚本。

CVSS 7.2 · High EPSS 0.49% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
brainstormforce SureForms – Contact Form Builder, AI Forms, Payment Form, Survey & Quiz ≤ 2.12.2 affected
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I. Basic Information for CVE-2026-18406

Vulnerability Information
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Vulnerability Title
SureForms <= 2.12.2 - Unauthenticated Stored Cross-Site Scripting via Text Field Entity-Encoded Payload
Source: CVE Program / CVE List V5
Vulnerability Description
The SureForms – Contact Form Builder, AI Forms, Payment Form, Survey & Quiz plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Text Field Entity-Encoded Payload in all versions up to, and including, 2.12.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress SureForms 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress SureForms是WordPress基金会的一款高级在线表单构建插件。 WordPress SureForms 2.12.2及之前版本存在跨站脚本漏洞，该漏洞源于通过文本字段实体编码有效载荷时输入清理和输出转义不足，可能导致存储型跨站脚本攻击，未经身份验证的攻击者可在页面中注入任意Web脚本，当用户访问被注入的页面时执行这些脚本。
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 Builder, AI Forms, Payment Form, Survey & Quiz 0 ~ 2.12.2 -

II. Public POCs for CVE-2026-18406

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III. Intelligence Information for CVE-2026-18406

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Patches & Fixes for CVE-2026-18406 (4)

Vendor Pages for CVE-2026-18406 (1)

Other References for CVE-2026-18406 (1)

IV. Related Vulnerabilities

Same product: SureForms – Contact Form Builder, AI Forms, Payment Form, Survey & Quiz
Same vendor: brainstormforce
Same weakness: CWE-79