CVE-2017-20192

Formidable Form Builder < 2.05.03 - Unauthenticated Stored Cross-Site Scripting

The Formidable Form Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple parameters submitted during form entries like 'after_html' in versions before 2.05.03 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in a victim's browser.

Affected

strategy11team · Formidable Forms – Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder

CVSS v3.1 NVD

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v3.1 WORDFENCE

8.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

EPSS

1.09% chance of exploitation in the next 30 days, 65th percentile

Nuclei

medium · CWE-79

Published

2024-10-16

Updated

2026-04-08

Proof-of-concept exploits (1)

• https://klikki.fi/adv/formidable.html

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2017/CVE-2017-20192.yaml

Security advisories

• https://www.wordfence.com/threat-intel/vulnerabilities/id/900fcaab-2424-4ae8-af18-95659db…
• https://wordpress.org/plugins/formidable/#developers

References

• CVE Record
• NVD entry