What is CVE-2023-6842?

CVE-2023-6842 is a medium-severity vulnerability in Strategy11 Formidable Form Builder, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2024-01-09.

How severe is CVE-2023-6842?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Is CVE-2023-6842 known to be exploited?

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

XSS in Strategy11 Formidable Form Builder

CVE-2023-6842

The Formidable Forms – Contact Form, Survey, Quiz, Payment, Calculator Form & Custom Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the name field label and description field label parameter in all versions up to 6.7 (inclusive) due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. By default, this only affects multi-site installations and installations where unfiltered_html has been disabled. However, in the formidable settings admins can extend form creation, deletion and other management permissions to other user types, which makes it possible for this vulnerability to be exploited by lower level user types as long as they have been granted the proper permissions.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2024-01-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

www.wordfence.com/threat-intel/vulnerabilities/id/47e402c3-e06c-4ac9-8c60-5666c… (Third Party Advisory)
plugins.trac.wordpress.org/changeset (Third Party Advisory)

Frequently asked questions

What is CVE-2023-6842?: CVE-2023-6842 is a medium-severity vulnerability in Strategy11 Formidable Form Builder, classified under Cross-site Scripting. CVSS score: 4.4/10. Published 2024-01-09.
How severe is CVE-2023-6842?: Medium severity. CVSS v3 base score is 4.4 out of 10.
Is CVE-2023-6842 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.