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CVE-2026-91152— Everest Forms <= 3.6.2 - Reflected Cross-Site Scripting via 'evf_toast_type' Parameter

Quick assessment

Affected
wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI
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"Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI"在 3.6.2 及之前所有版本中，由于输入过滤和输出转义不足，存在通过 参数触发的反射型跨站脚本（XSS）漏洞。这使得未经身份验证的攻击者能够向页面注入任意 Web 脚本；若攻击者能成功诱使用户执行某些操作（例如点击恶意链接），这些脚本即可被执行。利用该漏洞需要其关联的 参数能够成功通过 函数解码，而这一前提条件极易由

CVSS 6.1 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-91152

Vulnerability Information
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Vulnerability Title
Everest Forms <= 3.6.2 - Reflected Cross-Site Scripting via 'evf_toast_type' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'evf_toast_type' parameter in all versions up to, and including, 3.6.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link. Exploitation requires the sibling evf_toast parameter to decode successfully via atob(), but this is a trivially attacker-controlled prerequisite.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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
wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI 0 ~ 3.6.2 -

II. Public POCs for CVE-2026-91152

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III. Intelligence Information for CVE-2026-91152

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Other References for CVE-2026-91152 (5)

IV. Related Vulnerabilities

Same product: Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI
Same vendor: wpeverest
Same weakness: CWE-79