CVE-2026-3296— Everest Forms <= 3.4.3 - Unauthenticated PHP Object Injection via Form Entry Metadata
Quick assessment
Affected
wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
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 3.4.3及之前版本存在代码问题漏洞，该漏洞源于对来自表单条目元数据的不可信输入进行反序列化，可能导致未经身份验证的攻击者注入序列化的PHP对象有效载荷，从而引发PHP对象注入攻击。
Public Exploits 1
Nuclei · 1
CVE-2026-3296.yaml [template]
Possible ATT&CK Techniques 2 AI
T1189 · Drive-by Compromise T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-3296
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Everest Forms <= 3.4.3 - Unauthenticated PHP Object Injection via Form Entry Metadata
Source: CVE Program / CVE List V5
Vulnerability Description
The Everest Forms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.4.3 via deserialization of untrusted input from form entry metadata. This is due to the html-admin-page-entries-view.php file calling PHP's native unserialize() on stored entry meta values without passing the allowed_classes parameter. This makes it possible for unauthenticated attackers to inject a serialized PHP object payload through any public Everest Forms form field. The payload survives sanitize_text_field() sanitization (serialization control characters are not stripped) and is stored in the wp_evf_entrymeta database table. When an administrator views entries or views an individual entry, the unsafe unserialize() call processes the stored data without class restrictions.
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 3.4.3及之前版本存在代码问题漏洞，该漏洞源于对来自表单条目元数据的不可信输入进行反序列化，可能导致未经身份验证的攻击者注入序列化的PHP对象有效载荷，从而引发PHP对象注入攻击。
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)
Shenlong Deep Dive — AI Deep Analysis
10-question deep dive: root cause, exploitation, mitigation, urgency. Read summary free, full version requires login.
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| wpeverest | Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder | 0 ~ 3.4.3 | - |
|
II. Public POCs for CVE-2026-3296
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | The Everest Forms plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.4.3 via deserialization of untrusted input from form entry metadata. This is due to the html-admin-page-entries-view.php file calling PHP's native unserialize() on stored entry meta values without passing the allowed_classes parameter. This makes it possible for unauthenticated attackers to inject a serialized PHP object payload through any public Everest Forms form field. The payload survives sanitize_text_field() sanitization (serialization control characters are not stripped) and is stored in the wp_evf_entrymeta database table. When an administrator views entries or views an individual entry, the unsafe unserialize() call processes the stored data without class restrictions. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-3296.yaml | POC Details |
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-3296
请登录查看更多情报信息。
IV. Related Vulnerabilities
-
CVE-2026-4888
Everest Forms – Contact Form, Payment Form, Quiz, Survey & C -
CVE-2026-5478
Everest Forms <= 3.4.4 - Unauthenticated Arbitrary File Read -
CVE-2025-3421
Everest Forms <= 3.1.1 - Reflected Cross-Site Scripting -
CVE-2025-3439
Everest Forms – Contact Form, Quiz, Survey, Newsletter & Pay -
CVE-2025-3422
Everest Forms <= 3.1.1 - Authenticated (Subscriber+) Arbitra
Same vendor: wpeverest
-
CVE-2026-74017
WordPress User Registration plugin <= 5.2.7 - Broken Access -
CVE-2026-62103
WordPress Everest Forms plugin <= 3.6.0 - PHP Object Injecti -
CVE-2026-5096
Everest Forms <= 3.4.4 - Unauthenticated Server-Side Request -
CVE-2026-74001
WordPress User Registration & Membership Pro plugin <= 5.4.5 -
CVE-2026-73995
WordPress User Registration plugin <= 5.2.6 - Broken Authent
Same weakness: CWE-502
-
CVE-2026-93872
Cotonti 1.0.0 PHP Object Injection via Comments Plugin Edit -
CVE-2026-81657
IBM Guardium Data Protection is affected by multiple vulnera -
CVE-2026-11711
IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5 -
CVE-2025-66455
LMDeploy has Remote Code Execution by Pickle Deserialization -
CVE-2026-10751
IBM MQ Java messaging is vulnerable to remote code execution
V. Comments for CVE-2026-3296
No comments yet