CVE-2021-24879 : Exploit Details and Defense Strategies

A detailed overview of CVE-2021-24879 affecting the SupportCandy WordPress plugin.

Understanding CVE-2021-24879

This CVE describes a vulnerability in the SupportCandy plugin that could lead to a Cross-Site Scripting (XSS) attack.

What is CVE-2021-24879?

The SupportCandy WordPress plugin before version 2.2.7 lacks CSRF protection in the wpsc_tickets AJAX action, making it vulnerable to XSS attacks.

The Impact of CVE-2021-24879

Attackers could exploit this vulnerability to manipulate filters in a user's cookies, potentially executing malicious XSS payloads.

Technical Details of CVE-2021-24879

Exploring the specifics of the vulnerability in the SupportCandy plugin.

Vulnerability Description

The absence of proper CSRF checks and input sanitization in the plugin's filters opens the door for attackers to inject XSS payloads.

Affected Systems and Versions

SupportCandy versions older than 2.2.7 are susceptible to this vulnerability, leaving them open to exploitation.

Exploitation Mechanism

By tricking logged-in users to set a malicious filter through a crafted cookie, attackers can execute XSS attacks.

Mitigation and Prevention

Guidance on safeguarding systems against CVE-2021-24879.

Immediate Steps to Take

Users should update SupportCandy to version 2.2.7 or newer to mitigate the XSS risk and enhance security.

Long-Term Security Practices

Maintain regular plugin updates, employ web application firewalls, and educate users on the dangers of interacting with suspicious content.

Patching and Updates

Stay informed about security patches for all plugins, including SupportCandy, and promptly apply any available updates.