CVE-2021-4367 : Vulnerability Insights and Analysis

A Stored Cross-Site Scripting vulnerability exists in the Flo Forms - Easy Drag & Drop Form Builder WordPress plugin, allowing authenticated attackers to inject arbitrary scripts. This CVE has a CVSS base score of 6.4.

Understanding CVE-2021-4367

This section delves into the details of the CVE-2021-4367 vulnerability, its impact, technical description, affected systems, exploitation mechanism, mitigation, and prevention methods.

What is CVE-2021-4367?

The Flo Forms - Easy Drag & Drop Form Builder plugin for WordPress is susceptible to Stored Cross-Site Scripting via Options Change due to inadequate input sanitization. Attackers can inject malicious scripts that execute when users access affected pages.

The Impact of CVE-2021-4367

The vulnerability's impact lies in allowing authenticated attackers, such as subscribers, to insert harmful web scripts into pages, compromising user data and site integrity.

Technical Details of CVE-2021-4367

This section discusses the specifics of the vulnerability, including its description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The Stored Cross-Site Scripting vulnerability enables authenticated attackers to inject arbitrary web scripts via the plugin's AJAX action, potentially leading to site compromise.

Affected Systems and Versions

The vulnerability affects versions up to and including 1.0.35 of the Flo Forms - Easy Drag & Drop Form Builder plugin for WordPress.

Exploitation Mechanism

The flaw arises from insufficient input sanitization, output escaping, and missing capability checks, providing attackers with the opportunity to execute malicious scripts.

Mitigation and Prevention

In this section, we discuss the steps to mitigate the CVE-2021-4367 vulnerability and prevent future occurrences.

Immediate Steps to Take

Website administrators should update the Flo Forms plugin to version 1.0.36 or later to mitigate the vulnerability. Additionally, regularly monitoring for unauthorized script injections is advised.

Long-Term Security Practices

To enhance site security, developers should implement robust input sanitization, output escaping, and conduct regular security audits to detect and address vulnerabilities proactively.

Patching and Updates

Users are recommended to stay informed about security updates for the Flo Forms - Easy Drag & Drop Form Builder plugin and promptly apply patches to protect their websites.