Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI <= 3.5.2 - Missing Authorization to Authenticated (Delegated+) Arbitrary Plugin Activation via REST API and AJAX Endpoints

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-13167
StatePUBLISHED
AssignerWordfence
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-16 05:16:46 UTC
Updated2026-08-16 05:16:46 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-862 | CWE-862 CWE-862 Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wpeverest Everest Forms Contact Form Payment Form Quiz Survey Custom Form Builder With AI affected 3.5.2 semver Not specified

References

ReferenceSourceLinkTags
plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/class-evf-ajax.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/RestApi/controllers... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/RestApi/controllers... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/class-evf-ajax.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/class-evf-ajax.php [email protected] plugins.trac.wordpress.org
www.wordfence.com/threat-intel/vulnerabilities/id/6d1ba996-e26c-45cc-ab95-33866... [email protected] www.wordfence.com
plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/class-evf-ajax.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/everest-forms/tags/3.4.5/includes/RestApi/controllers... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/class-evf-ajax.php [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/RestApi/controllers... [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/changeset [email protected] plugins.trac.wordpress.org
plugins.trac.wordpress.org/browser/everest-forms/tags/3.5.1/includes/class-evf-ajax.php [email protected] plugins.trac.wordpress.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: skyv3il (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-06-24T13:35:53.000ZVendor Notified
CNA2026-08-15T00:00:00.000ZDisclosed

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