What is CVE-2024-11188?

CVE-2024-11188 is a medium-severity vulnerability in Strategy11 Formidable Forms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2024-11-23.

How severe is CVE-2024-11188?

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

XSS in Strategy11 Formidable Forms

CVE-2024-11188

The Formidable Forms – Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder plugin for WordPress is vulnerable to POST-Based Reflected Cross-Site Scripting via the Custom HTML Form parameters in all versions up to, and including, 6.16.1.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2024-11-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (31.8th percentile), scored 2026-09-28.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.8% 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: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.wordfence.com/threat-intel/vulnerabilities/id/da84aa80-7ef6-4846-870d-07bf8… (Third Party Advisory)
plugins.trac.wordpress.org/browser/formidable/tags/6.16/classes/helpers/FrmFiel… (Product)

Frequently asked questions

What is CVE-2024-11188?: CVE-2024-11188 is a medium-severity vulnerability in Strategy11 Formidable Forms, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2024-11-23.
How severe is CVE-2024-11188?: Medium severity. CVSS v3 base score is 6.1 out of 10.