CVE-2021-24653 : Security Advisory and Response

The Cookie Bar WordPress plugin before version 1.8.9 is vulnerable to a Stored Cross-Site Scripting (XSS) issue that could be exploited by high privilege users, allowing them to perform XSS attacks.

Understanding CVE-2021-24653

This CVE involves a security vulnerability in the Cookie Bar plugin for WordPress, potentially leading to Cross-Site Scripting attacks.

What is CVE-2021-24653?

The vulnerability in the Cookie Bar plugin version prior to 1.8.9 arises from improper sanitization of the Cookie Bar Message setting, enabling privileged users to execute XSS attacks despite restrictions.

The Impact of CVE-2021-24653

The impact of this vulnerability is significant as it may allow attackers with high privileges to inject malicious scripts into the website, leading to potential data theft, defacement, or account takeover.

Technical Details of CVE-2021-24653

In-depth technical details surrounding the vulnerability and its implications.

Vulnerability Description

The issue lies in the failure to properly sanitize user input for the Cookie Bar Message setting, exposing the site to XSS attacks even when unfiltered_html permissions are restricted.

Affected Systems and Versions

The affected version is Cookie Bar plugin less than 1.8.9, indicating that sites using versions prior to this are at risk of exploitation.

Exploitation Mechanism

By leveraging the vulnerability in the Cookie Bar plugin, attackers can bypass security measures and inject malicious scripts into web pages, ultimately compromising user data or site functionality.

Mitigation and Prevention

Steps to mitigate and prevent the exploitation of CVE-2021-24653.

Immediate Steps to Take

Website administrators are advised to update the Cookie Bar plugin to version 1.8.9 or higher to patch the vulnerability and prevent potential XSS attacks.

Long-Term Security Practices

Implement regular security audits and ensure all plugins and themes are regularly updated to address known vulnerabilities and enhance overall site security.

Patching and Updates

Stay informed about security patches released by plugin developers and promptly apply updates to ensure your WordPress site is protected against known vulnerabilities.