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

8.3
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2017-20192
CVSS 8.3 (High)
Publicly Published November 13, 2017
Last Updated October 16, 2024
Researcher Jouko Pynnöne

Description

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.

Wordfence blocked 1,761 attacks targeting this vulnerability in the past 24 hours.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

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Vulnerability Details for Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More

Software Type Plugin
Software Slug formidable (view on wordpress.org)
Patched? Yes
Remediation Update to version 2.05.03, or a newer patched version
Affected Version
  • < 2.05.03
Patched Version
  • 2.05.03

Recent vulnerabilities in Formidable Forms – WordPress Form Builder for Contact Forms, Calculators, Quizzes & More

# Title CVE ID CVSS Researchers Date
1 Formidable Forms <= 6.28 - Unauthenticated Payment Amount Manipulation via 'item_meta' Parameter CVE-2026-2888 5.3 Michael Iden (Mickhat) March 12, 2026
2 Formidable Forms <= 6.28 - Missing Authorization to Unauthenticated Payment Integrity Bypass via PaymentIntent Reuse CVE-2026-2890 7.5 Andrés Cruciani March 12, 2026
3 Formidable Forms – Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder <= 6.16.1.2 - Reflected Cross-Site Scripting via Custom HTML Form Parameter CVE-2024-11188 6.1 mikemyers November 22, 2024
4 Formidable Forms – Contact Form Plugin, Survey, Quiz, Payment, Calculator Form & Custom Form Builder <= 6.14 - Authenticated (Admin+) Stored Cross-Site Scripting CVE-2024-9768 4.4 Krugov Artyom October 31, 2024
5 Formidable Forms <= 6.11.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting CVE-2024-6725 4.9 zer0gh0st July 30, 2024
6 Formidable Forms <= 6.7.2 - Cross-Site Request Forgery to Stored Cross-Site Scripting CVE-2024-0660 6.1 Webbernaut January 26, 2024
7 Formidable Forms <= 6.7 - HTML Injection CVE-2023-6830 6.5 drop January 8, 2024
8 Formidable Forms <= 6.7 - Authenticated (Administrator+) Stored Cross-Site Scripting CVE-2023-6842 4.4 drop January 8, 2024
9 Formidable Forms <= 6.3 - Authenticated (Subscriber+) Arbitrary Plugin Installation and Activation CVE-2023-2877 6.5 Alex Sanford May 31, 2023
10 Formidable Forms <= 6.1.2 - Unauthenticated PHP Object Injection CVE-2023-1405 9.8 Nguyen Huu Do April 6, 2023

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