CVE-2021-32808 : Security Advisory and Response

A vulnerability has been identified in CKEditor 4 that allows attackers to execute JavaScript code by abusing the undo functionality. This article provides details on the impact, technical description, affected systems, and mitigation steps for CVE-2021-32808.

Understanding CVE-2021-32808

This section delves into the specifics of the CVE-2021-32808 vulnerability found in CKEditor 4.

What is CVE-2021-32808?

CVE-2021-32808 is a cross-site scripting vulnerability in CKEditor 4 due to the misuse of the undo feature with malformed widget HTML.

The Impact of CVE-2021-32808

The vulnerability poses a high severity risk with a base score of 7.6, allowing attackers to execute JavaScript code in affected systems.

Technical Details of CVE-2021-32808

This section outlines the technical aspects of the CVE-2021-32808 vulnerability.

Vulnerability Description

The vulnerability arises from the clipboard Widget plugin when used in conjunction with the undo feature, enabling the execution of JavaScript code.

Affected Systems and Versions

Users of CKEditor 4 versions ranging from >= 4.13.0 to < 4.16.2 are susceptible to this security flaw.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging malformed widget HTML within the undo functionality to trigger malicious JavaScript code.

Mitigation and Prevention

Learn how to protect your systems against CVE-2021-32808.

Immediate Steps to Take

Users should update CKEditor to version 4.16.2 to apply the necessary patches and mitigate the risk of exploitation.

Long-Term Security Practices

Implement secure coding practices and regular security audits to prevent cross-site scripting vulnerabilities.

Patching and Updates

Stay informed about security updates and promptly apply patches released by CKEditor to address potential security threats.