CVE-2026-84258 click5 CRM add-on to Ninja Forms <= 1.0.1 - Unauthenticated Stored XSS via post_notifications
Unauthenticated attackers can inject malicious scripts via form submissions, potentially compromising admin accounts in the click5 CRM add-on for Ninja Forms.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-84258?
CVE-2026-84258 is a high-severity cross-site scripting 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, and only if a user opens a file or follows a link.
Official description
The click5 CRM add-on to Ninja Forms WordPress plugin through 1.0.1 does not sanitise and escape content submitted through an unauthenticated endpoint before outputting it back in an admin page, leading to Stored XSS which could be used against high privilege users such as admin.
Weakness: CWE-79
Which versions are affected by CVE-2026-84258?
How do I fix CVE-2026-84258?
No fix has been published for CVE-2026-84258 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-84258 being exploited?
There is no known exploitation of CVE-2026-84258 in the wild and no public exploit code.
Sources
Also known as GHSA-wvmg-3v75-jqv9.