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CVE-2026-13167

MEDIUM 4.3 CVSS 3.1
Published
August 16, 2026
Last modified
August 20, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-862
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Description

The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.5.2. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with delegated form management access and above, to activate arbitrary already-installed WordPress plugins — including previously deactivated or vulnerable plugins — without holding the core activate_plugins capability. Exploitation requires the target user to hold a delegated Everest Forms capability (manage_everest_forms, everest_forms_create_forms, or everest_forms_view_forms), which the plugin's own roles and permissions tool allows administrators to assign to non-administrator roles such as Author; the nonces required to exploit the AJAX handlers are emitted on EVF admin pages accessible to any such delegated user.

Affected WordPress components

  • Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI Plugin · everest-forms
    Confirmed match Active
    Up to and including 3.5.2
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • wpeverest Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI — Up to and including 3.5.2

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/RestApi/controllers/version1/class-evf-modules.php#L315
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/RestApi/controllers/version1/class-evf-modules.php#L730
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/class-evf-ajax.php#L121
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/class-evf-ajax.php#L1408
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/class-evf-ajax.php#L709
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/RestApi/controllers/version1/class-evf-modules.php#L315
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/RestApi/controllers/version1/class-evf-modules.php#L730
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/class-evf-ajax.php#L121
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/class-evf-ajax.php#L1408
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/class-evf-ajax.php#L709
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?reponame=&old=3634069%40everest-forms&new=3634069%40everest-forms
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/6d1ba996-e26c-45cc-ab95-338663f481d9?source=cve
  • nvd.nist.gov Official NVD record