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CVE-2025-3439— Everest Forms – Contact Form, Quiz, Survey, Newsletter & Payment Form Builder for WordPress <= 3.1.1 - Unauthenticated PHP Object Injection

Quick assessment

Affected
wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
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。该平台支持在PHP和MySQL的服务器上架设个人博客网站。WordPress plugin是一个应用插件。 WordPress plugin Everest Forms 3.1.1及之前版本存在代码问题漏洞，该漏洞源于反序列化不受信任的输入，导致PHP对象注入。

CVSS 9.8 · Critical EPSS 1.13% · P64
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I. Basic Information for CVE-2025-3439

Vulnerability Information
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Vulnerability Title
Everest Forms – Contact Form, Quiz, Survey, Newsletter & Payment Form Builder for WordPress <= 3.1.1 - Unauthenticated PHP Object Injection
Source: CVE Program / CVE List V5
Vulnerability Description
The Everest Forms – Contact Form, Quiz, Survey, Newsletter & Payment Form Builder for WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.1.1 via deserialization of untrusted input from the 'field_value' parameter. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
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
可信数据的反序列化
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Everest Forms 代码问题漏洞
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。该平台支持在PHP和MySQL的服务器上架设个人博客网站。WordPress plugin是一个应用插件。 WordPress plugin Everest Forms 3.1.1及之前版本存在代码问题漏洞，该漏洞源于反序列化不受信任的输入，导致PHP对象注入。
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 – Contact Form, Quiz, Survey, Newsletter & Payment Form Builder for WordPress * ~ 3.1.1 -

II. Public POCs for CVE-2025-3439

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III. Intelligence Information for CVE-2025-3439

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Vendor Advisories for CVE-2025-3439 (1)

Same Patch Batch · wpeverest · 2025-04-11 · 3 CVEs total

CVE-2025-3421 6.1 MEDIUM Everest Forms <= 3.1.1 - Reflected Cross-Site Scripting
CVE-2025-3422 5.4 MEDIUM Everest Forms <= 3.1.1 - Authenticated (Subscriber+) Arbitrary Shortcode Execution

IV. Related Vulnerabilities

Same product: Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
Same vendor: wpeverest
Same weakness: CWE-502

V. Comments for CVE-2025-3439

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