Stored Cross-Site Scripting Vulnerability in Ninja Forms Plugin for WordPress
CVE-2026-90438

7.2HIGH

Key Information:

Vendor

WordPress
Status
Ninja Forms – Contact Form Builder With Calculators, Quizzes, Signatures & Ai Form Builder
Vendor
CVE Published:
2 October 2026

What is CVE-2026-90438?

The Ninja Forms plugin for WordPress is susceptible to a Stored Cross-Site Scripting vulnerability through the Paragraph Text field using the Rich Text Editor (RTE) option. This flaw arises from inadequate input sanitization and output escaping, allowing unauthenticated attackers to inject malicious web scripts. Consequently, any user visiting an affected page may inadvertently execute the injected scripts, leading to possible credential theft or site compromise. It is crucial for users to update to the latest version to mitigate these risks.

Affected Version(s)

Ninja Forms – Contact Form Builder with Calculators, Quizzes, Signatures & AI Form Builder 0 <= 3.15.4

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/ninja-forms/ta...
https://plugins.trac.wordpress.org/browser/ninja-forms/ta...

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

UKO
.