CVE-2021-24416 Explained : Impact and Mitigation

StreamCast < 2.1.1 - Contributor+ Stored Cross-Site Scripting vulnerability allows users with a role as low as contributor to insert malicious code into WordPress pages.

Understanding CVE-2021-24416

This CVE refers to a security issue in the StreamCast - Radio Player for WordPress plugin prior to version 2.1.1, enabling unauthorized users to execute cross-site scripting attacks.

What is CVE-2021-24416?

The StreamCast - Radio Player for WordPress plugin, when running versions below 2.1.1, fails to properly filter and validate input data in its shortcode parameters. This oversight permits attackers with lower-level roles like contributor to implant malicious scripts, potentially leading to cross-site scripting (XSS) attacks.

The Impact of CVE-2021-24416

This vulnerability could be exploited by malicious contributors or low-level user roles to inject harmful code into WordPress pages using the plugin's shortcode, risking sensitive data exposure, defacement, or unauthorized site administration.

Technical Details of CVE-2021-24416

The following details shed light on the technical aspects of CVE-2021-24416.

Vulnerability Description

The flaw arises from the lack of input validation in the StreamCast - Radio Player plugin, empowering contributors and possibly other low-level roles to insert XSS payloads through the plugin's shortcode parameters.

Affected Systems and Versions

The StreamCast - Radio Player for WordPress plugin versions that are earlier than 2.1.1 are impacted by this vulnerability.

Exploitation Mechanism

With this vulnerability, threat actors with contributor privileges can exploit the plugin's inadequately sanitized shortcode parameters to plant malicious scripts on WordPress pages, triggering XSS attacks.

Mitigation and Prevention

To safeguard your systems, consider the following security measures against CVE-2021-24416.

Immediate Steps to Take

Update the StreamCast - Radio Player for WordPress plugin to version 2.1.1 or newer. Additionally, review and sanitize any content added through the plugin's shortcode to mitigate the risk of XSS attacks.

Long-Term Security Practices

Enforce the principle of least privilege by assigning roles based on necessary permissions. Regularly monitor for unusual activities and behavior on your WordPress site, and educate users on secure practices to prevent future vulnerabilities.

Patching and Updates

Always stay vigilant for security updates and patches released by plugin developers. Promptly apply these updates to keep your WordPress environment secure.