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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 插件 “SureForms – 联系表单构建器、AI 表单、支付表单、问卷与测验”在 2.12.2 及之前的所有版本中，由于输入净化和输出转义不足，容易遭受存储型跨站脚本（Stored Cross-Site Scripting）攻击，攻击途径是通过文本字段中的实体编码负载。这使得未经验证的攻击者能够注入任意的 Web 脚本，当用户访问被注入的页面时，这些脚本将会被执行。

CVSS 7.2 · High
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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

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

V. Comments for CVE-2026-18406

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