CVE-2026-94504 Ninja Forms – The Contact Form Builder That Grows With You <= 3.15.3 - Stored Cross-Site Scripting
Stored XSS in Ninja Forms allows attackers to execute scripts in the admin panel when viewing submissions, potentially leading to account 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-2026-94504?
CVE-2026-94504 is a high-severity cross-site scripting vulnerability in kstover Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Ninja Forms 3.15.3 stores an anonymous non-RTE textarea value and renders it without safe HTML encoding in the legacy submission editor. An attacker can break out of the textarea with stored script. When an Administrator opens the attacker-known direct submission URL, the script runs in the WordPress admin origin.
Weakness: CWE-79
Which versions are affected by CVE-2026-94504?
How do I fix CVE-2026-94504?
No fix has been published for CVE-2026-94504 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-2026-94504 being exploited?
There is no known exploitation of CVE-2026-94504 in the wild and no public exploit code.
Sources
Also known as GHSA-9248-28p4-jpfp.