CVE-2021-24429 : Exploit Details and Defense Strategies

The Salon Booking System WordPress plugin before version 6.3.1 is affected by an Unauthenticated Stored Cross-Site Scripting (XSS) vulnerability, allowing low-privilege users to inject malicious scripts.

Understanding CVE-2021-24429

This CVE involves a vulnerability in the Salon booking system WordPress plugin that could be exploited by subscribers to execute malicious JavaScript.

What is CVE-2021-24429?

The vulnerability in the Salon Booking System WordPress plugin version prior to 6.3.1 enables low-privilege users to insert JavaScript in the First Name field during appointment booking.

The Impact of CVE-2021-24429

A Stored Cross-Site Scripting (XSS) attack could occur, triggering a malicious script execution when an admin accesses the "Calendar" page.

Technical Details of CVE-2021-24429

This section covers the specific technical aspects of the CVE.

Vulnerability Description

The flaw lies in the plugin's failure to properly sanitize and escape user inputs, specifically in the First Name field, leading to an XSS risk.

Affected Systems and Versions

Salon Booking System versions earlier than 6.3.1 are prone to this vulnerability.

Exploitation Mechanism

By entering a malicious script into the First Name field, a subscriber can execute it in the admin context, potentially compromising the website.

Mitigation and Prevention

To safeguard your system from CVE-2021-24429, immediate actions and long-term strategies are recommended.

Immediate Steps to Take

Users should update the Salon Booking System plugin to version 6.3.1 or newer to mitigate the XSS risk and enhance security.

Long-Term Security Practices

Regularly updating plugins and maintaining strict input validation practices can prevent such vulnerabilities in the future.

Patching and Updates

Stay informed about security patches and updates released by the plugin vendor to address known vulnerabilities promptly.