CVE-2026-90438 Ninja Forms <= 3.15.4 - Unauthenticated Stored Cross-Site Scripting via Paragraph Text (RTE) Field Submission
Unauthenticated attackers can inject arbitrary scripts via Paragraph Text fields when the Rich Text Editor is enabled, affecting WordPress sites using Ninja Forms.
- 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-2026-90438?
CVE-2026-90438 is a high-severity cross-site scripting vulnerability in kstover Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Paragraph Text (RTE) Field Submission in all versions up to, and including, 3.15.4 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This is only exploitable when the targeted Paragraph Text field has the Rich Text Editor (RTE) option enabled.
Weakness: CWE-79
Which versions are affected by CVE-2026-90438?
How do I fix CVE-2026-90438?
No fix has been published for CVE-2026-90438 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-2026-90438 being exploited?
There is no known exploitation of CVE-2026-90438 in the wild and no public exploit code.
Sources
Also known as GHSA-7cq6-x444-93vj.