How severe is CVE-2026-94504?

High severity. CVSS v3 base score is 7.2 out of 10.

Is CVE-2026-94504 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

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)

Published 2026-09-22 · last modified 2026-09-22.

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.

EPSS exploit prediction

EPSS: 0.006 (49.7th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.002

Affected products

Kstover Ninja Forms – Contact Form Builder With Calculators, Quizzes, Signatures & Ai

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

cflowsec/cve-2026-94504

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.
Is CVE-2026-94504 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.