XSS in Kstover Ninja Forms – Contact Form Builder With Calculators, Quizzes, Signatures & Ai
CVE-2026-94504
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.
Vulnerability class: XSS (Cross-Site Scripting)
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-94504?
- CVE-2026-94504 is a high-severity vulnerability in Kstover Ninja Forms – Contact Form Builder With Calculators, Quizzes, Signatures & Ai, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-09-22.
- How severe is CVE-2026-94504?
- High severity. CVSS v3 base score is 7.2 out of 10.