CVE-2026-84251 click5 CRM add-on to Ninja Forms <= 1.0.1 - Unauthenticated Arbitrary Options Update
Unauthenticated attackers can update arbitrary WordPress options via a REST endpoint, enabling the creation of administrator accounts and full site takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84251?
CVE-2026-84251 is a critical missing authorization vulnerability in Unknown click5 CRM add-on to Ninja Forms, published on 11 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-84251?
How do I fix CVE-2026-84251?
No fix has been published for CVE-2026-84251 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-84251 being exploited?
There is no known exploitation of CVE-2026-84251 in the wild and no public exploit code.
Sources
Also known as GHSA-rc92-56xm-4g7v.