What is CVE-2017-18574?

CVE-2017-18574 is a medium-severity vulnerability in Ninjaforms Ninja Forms, classified under Improper Input Validation. CVSS score: 6.1/10. Published 2019-08-22.

How severe is CVE-2017-18574?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2017-18574 known to be exploited?

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

Improper input validation in Ninjaforms Ninja Forms

CVE-2017-18574

The ninja-forms plugin before 3.0.31 for WordPress has insufficient HTML escaping in the builder.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2019-08-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Ninjaforms Ninja Forms

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

20142995/nuclei-templates

References

wordpress.org/plugins/ninja-forms/ (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2017-18574?: CVE-2017-18574 is a medium-severity vulnerability in Ninjaforms Ninja Forms, classified under Improper Input Validation. CVSS score: 6.1/10. Published 2019-08-22.
How severe is CVE-2017-18574?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2017-18574 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.