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.
History

Wed, 08 Apr 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Wpeverest
Wpeverest everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder
Vendors & Products Wordpress
Wordpress wordpress
Wpeverest
Wpeverest everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder

Wed, 08 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 08 Apr 2026 01:45:00 +0000

Type Values Removed Values Added
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.
Title Everest Forms <= 3.4.3 - Unauthenticated PHP Object Injection via Form Entry Metadata
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published: 2026-04-08T01:24:43.946Z

Updated: 2026-04-08T16:42:45.183Z

Reserved: 2026-02-26T20:09:26.417Z

Link: CVE-2026-3296

cve-icon Vulnrichment

Updated: 2026-04-08T14:21:46.392Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-08T02:16:04.067

Modified: 2026-04-08T21:26:35.910

Link: CVE-2026-3296

cve-icon Redhat

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