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Vulnerability · Published Oct 2, 2026 · Assigned by Wordfence

CVE-2026-90438Ninja Forms <= 3.15.4 - Unauthenticated Stored Cross-Site Scripting via Paragraph Text (RTE) Field Submission

High 7.2

In plain English

A high-severity cross-site scripting in Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder from kstover. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.3%top 78.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected products (as reported)

VendorProductVersions
kstover Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder 0 – through 3.15.4

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References