What is CVE-2026-84251?

CVE-2026-84251 is a critical-severity vulnerability in Click5 Crm Add-On To Ninja Forms, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-10-11.

How severe is CVE-2026-84251?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Click5 Crm Add-On To Ninja Forms

CVE-2026-84251

The click5 CRM add-on to Ninja Forms WordPress plugin through 1.0.1 does not have authorisation and CSRF checks when updating options via a REST endpoint, and does not ensure that the option to be updated belongs to the click5 CRM add-on to Ninja Forms WordPress plugin through 1.0.1. As a result, unauthenticated attackers could change arbitrary blog options, allowing them to create a new administrator account and take over the site.

Vulnerability class: Broken Access Control

Published 2026-10-11 · last modified 2026-10-11.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Click5 Crm Add-On To Ninja Forms

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

wpscan.com/vulnerability/db54e1a5-51bc-431d-9a9e-9fa3ac96a817/ (technical-description, exploit, vdb-entry)

Frequently asked questions

What is CVE-2026-84251?: CVE-2026-84251 is a critical-severity vulnerability in Click5 Crm Add-On To Ninja Forms, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-10-11.
How severe is CVE-2026-84251?: Critical severity. CVSS v3 base score is 9.8 out of 10.