CVE-2021-24878 : Security Advisory and Response

This article provides details about the CVE-2021-24878 vulnerability found in the SupportCandy WordPress plugin before version 2.2.7, leading to Reflected Cross-Site Scripting.

Understanding CVE-2021-24878

This CVE details a security issue in the SupportCandy WordPress plugin that allows for Reflected Cross-Site Scripting attacks.

What is CVE-2021-24878?

The vulnerability in the SupportCandy plugin, versions before 2.2.7, fails to properly sanitize and escape the query string. This oversight occurs in pages utilizing the [wpsc_create_ticket] shortcode embed, enabling malicious actors to execute XSS attacks.

The Impact of CVE-2021-24878

Exploitation of this vulnerability can result in attackers injecting and executing malicious scripts in the context of a user's web browser. This can lead to various attacks, including data theft, account hijacking, and spreading malware.

Technical Details of CVE-2021-24878

This section outlines the specifics of the CVE-2021-24878 vulnerability in the SupportCandy plugin.

Vulnerability Description

The vulnerability arises from the lack of proper sanitization and escaping of user-controlled data, allowing for the injection of malicious scripts into web pages.

Affected Systems and Versions

SupportCandy WordPress plugin versions earlier than 2.2.7 are vulnerable to this exploit. Users of these versions are at risk of XSS attacks if the vulnerable shortcode is present on their websites.

Exploitation Mechanism

Attackers can craft malicious URLs containing script payloads and trick users into clicking on them. When the user interacts with the compromised URL, the injected script gets executed within their browsing session.

Mitigation and Prevention

To secure systems from the CVE-2021-24878 vulnerability, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Users are advised to update the SupportCandy plugin to version 2.2.7 or later to mitigate the risk of XSS attacks. It is crucial to apply security patches promptly to prevent exploitation.

Long-Term Security Practices

In addition to updating the plugin, website owners should follow secure coding practices, input validation mechanisms, and implement content security policies to reduce the likelihood of XSS vulnerabilities.

Patching and Updates

Regularly check for plugin updates and security advisories. Maintain an updated version of the SupportCandy plugin to stay protected against known vulnerabilities.