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Everest Forms <= 3.6.2 — Insecure Direct Object Reference to Authenticated (Custom+) Arbitrary Entry/Form Disclosure and Deletion via MCP /tools/call JSON-RPC Endpoint

CVE-2026-89101Published · Updated

Action summary

Affected: ≤3.6.2Update to 3.6.3 or newer

All remediation steps
Watch plugin
Severity
Medium6.5
CVSS
6.5
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:U Scope
Unchanged
C:H Confidentiality
High
I:N Integrity
None
A:N Availability
None
Weakness
CWE-639 Authorization Bypass Through User-Controlled Key
Required access
Unknown
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI everest-forms

  1. Affected≤ 3.6.2
  2. Patched in3.6.3

Update to 3.6.3 or newer.

You are affected if you run ≤ 3.6.2. Version 3.6.3 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 3.6.3, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Trgomez.

The Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 3.6.2 via the get_entry due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with custom-level access and above, to view, read, and permanently delete forms and entries belonging to any other user — including personally identifiable information submitted through public contact and lead forms — regardless of form ownership.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI

All 31
More vulnerabilities in Everest Forms – Contact Form, Payment Form, Quiz, Survey & Custom Form Builder with AI
SeverityVulnerabilityCVEPublished
High7.5Unauthenticated Arbitrary File Read via 'Signature' Field Meta Key Branch of attach_entry_files
≤3.6.3No patch available
CVE-2026-115483
High8.2Unauthenticated Arbitrary File Deletion via 'everest_forms_{form_id}_old_{field_id}' Parameter
≤3.6.2Update to 3.6.3
CVE-2026-120513
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤3.6.3Update to 3.6.4
CVE-2026-122669
Medium4.3Missing Authorization
≤3.6.3Update to 3.6.4
CVE-2026-120837
Medium6.1Reflected Cross-Site Scripting via 'evf_toast_type' Parameter
≤3.6.2Update to 3.6.3
CVE-2026-91152

Timeline

  1. CVE published

    Severity medium, CVSS 6.5

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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