CVE-2021-41165 : What You Need to Know

CKEditor4 is an open source WYSIWYG HTML editor with a vulnerability in the core HTML processing module that allows the injection of malformed comments HTML, potentially leading to the execution of JavaScript code. This CVE affects versions below 4.17.0.

Understanding CVE-2021-41165

This CVE pertains to a vulnerability in CKEditor4 that can be exploited to execute JavaScript code.

What is CVE-2021-41165?

CKEditor4, versions less than 4.17.0, allow attackers to inject malformed comments HTML, bypassing content sanitization, potentially leading to JavaScript code execution.

The Impact of CVE-2021-41165

The vulnerability has a CVSS base score of 8.2, categorizing it as high severity. It affects confidentiality and requires user interaction to exploit, with low complexity.

Technical Details of CVE-2021-41165

A detailed look at the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in CKEditor4 allows the injection of malformed comments HTML, enabling the execution of JavaScript code.

Affected Systems and Versions

Product: ckeditor4
Vendor: ckeditor
Versions Affected: < 4.17.0

Exploitation Mechanism

The vulnerability can be exploited by injecting malicious comments HTML to execute JavaScript code in CKEditor4.

Mitigation and Prevention

Steps to secure systems against CVE-2021-41165.

Immediate Steps to Take

Upgrade CKEditor4 to version 4.17.0 or higher.
Monitor for any suspicious activities or unexpected code execution.

Long-Term Security Practices

Regularly update software and plugins to the latest versions.
Educate users about safe practices when using online editors.

Patching and Updates

Ensure all software components are up to date to prevent exploitation of this vulnerability.