---
id: CVE-2026-3296
title: >-
  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
summary: >-
  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…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
published: '2026-04-08'
updated: '2026-07-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-3296'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.3/includes/admin/views/html-admin-page-entries-view.php#L133
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.3/includes/evf-core-functions.php#L5594
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/everest-forms/trunk/includes/admin/views/html-admin-page-entries-view.php#L133
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3489938/everest-forms/tags/3.4.4/readme.txt?old=3464753&old_path=everest-forms%2Ftags%2F3.4.3%2Freadme.txt
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?old_path=/everest-forms/tags/3.4.3&new_path=/everest-forms/tags/3.4.4
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/2693ae37-790d-4b18-a9ec-054c8c27b8bc?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - exploit-available
epss: 0.03469
epssPercentile: 0.88547
ingestedAt: '2026-07-25T23:05:58.597Z'
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/xxconi/CVE-2026-3296'
  nuclei:
    - CVE-2026-3296
  checkedAt: '2026-09-23T07:13:59.068Z'
exploitAvailable: true
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.