What is CVE-2025-5398?

CVE-2025-5398 is a medium-severity vulnerability in Kstover Ninja Forms – The Contact Form Builder That Grows With You, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-06-27.

How severe is CVE-2025-5398?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Kstover Ninja Forms – The Contact Form Builder That Grows With You

CVE-2025-5398

The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the use of a templating engine in all versions up to, and including, 3.10.2.1 due to insufficient output e…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (30.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Kstover Ninja Forms – The Contact Form Builder That Grows With You — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2025-5398?: CVE-2025-5398 is a medium-severity vulnerability in Kstover Ninja Forms – The Contact Form Builder That Grows With You, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-06-27.
How severe is CVE-2025-5398?: Medium severity. CVSS v3 base score is 6.4 out of 10.