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CVE-2026-3300— Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field

Quick assessment

Affected
WPEverest Everest Forms Pro
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 Everest Forms Pro 1.9.12及之前版本存在代码注入漏洞，该漏洞源于Calculation Addon的process_filter函数将用户提交的表单字段值连接到PHP代码字符串时未正确转义，可能

CVSS 9.8 · Critical EPSS 4.43% · P91

Public Exploits 1

Nuclei · 1 CVE-2026-3300.yaml [template]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-3300

Vulnerability Information
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Vulnerability Title
Everest Forms Pro <= 1.9.12 - Unauthenticated Remote Code Execution via Calculation Field
Source: CVE Program / CVE List V5
Vulnerability Description
The Everest Forms Pro plugin for WordPress is vulnerable to Remote Code Execution via PHP Code Injection in all versions up to, and including, 1.9.12. This is due to the Calculation Addon's process_filter() function concatenating user-submitted form field values into a PHP code string without proper escaping before passing it to eval(). The sanitize_text_field() function applied to input does not escape single quotes or other PHP code context characters. This makes it possible for unauthenticated attackers to inject and execute arbitrary PHP code on the server by submitting a crafted value in any string-type form field (text, email, URL, select, radio) when a form uses the "Complex Calculation" feature.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Everest Forms Pro 代码注入漏洞
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 Everest Forms Pro 1.9.12及之前版本存在代码注入漏洞，该漏洞源于Calculation Addon的process_filter函数将用户提交的表单字段值连接到PHP代码字符串时未正确转义，可能
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
WPEverest Everest Forms Pro * ~ 1.9.12 -

II. Public POCs for CVE-2026-3300

# POC Description Source Link Shenlong Link
1 The Everest Forms Pro plugin for WordPress is vulnerable to Remote Code Execution via PHP Code Injection in all versions up to, and including, 1.9.12. This is due to the Calculation Addon's process_filter() function concatenating user-submitted form field values into a PHP code string without proper escaping before passing it to eval(). The sanitize_text_field() function applied to input does not escape single quotes or other PHP code context characters. This makes it possible for unauthenticated attackers to inject and execute arbitrary PHP code on the server by submitting a crafted value in any string-type form field (text, email, URL, select, radio) when a form uses the "Complex Calculation" feature. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-3300.yaml POC Details
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default-local-qwen3.6 · 9967 chars
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III. Intelligence Information for CVE-2026-3300

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Vendor Advisories for CVE-2026-3300 (1)

IV. Related Vulnerabilities

Same product: Everest Forms Pro
Same vendor: WPEverest
Same weakness: CWE-94

V. Comments for CVE-2026-3300

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