CVE-2021-33611 Explained : Impact and Mitigation
Learn about CVE-2021-33611, a medium severity vulnerability in Vaadin 14 affecting vaadin-menu-bar versions 1.0.0 to 1.2.0. Understand the impact, affected versions, and mitigation steps.
A detailed overview of CVE-2021-33611 focusing on the reflected cross-site scripting vulnerability found in vaadin-menu-bar webjar resources in Vaadin 14.
Understanding CVE-2021-33611
This CVE involves a reflected cross-site scripting vulnerability in Vaadin's vaadin-menu-bar webjar resources, impacting versions 1.0.0 through 1.2.0.
What is CVE-2021-33611?
The vulnerability arises from missing output sanitization in test sources, allowing remote attackers to execute malicious JavaScript by opening a crafted URL.
The Impact of CVE-2021-33611
The vulnerability's impact is rated as medium severity with a base score of 6.1 in the CVSS v3.1 scoring system. Attack vector is through the network, with user interaction required.
Technical Details of CVE-2021-33611
This section details the vulnerability description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability results from a lack of output sanitization in test sources, presenting a risk of executing malicious JavaScript through a crafted URL.
Affected Systems and Versions
Vaadin versions 14.0.0 through 14.4.4 along with vaadin-menu-bar versions 1.0.0 through 1.2.0 are impacted by this CVE.
Exploitation Mechanism
Remote attackers can exploit this vulnerability by luring users to open a specially crafted URL, enabling the execution of malicious JavaScript in the user's browser.
Mitigation and Prevention
Explore the necessary steps to mitigate the risks associated with CVE-2021-33611.
Immediate Steps to Take
It is recommended to update affected Vaadin and vaadin-menu-bar versions to the secure releases and avoid opening untrusted URLs.
Long-Term Security Practices
Incorporate secure coding practices, input validation, and output sanitization in the development process to prevent cross-site scripting vulnerabilities.
Patching and Updates
Regularly apply security patches and updates provided by Vaadin to address known vulnerabilities and enhance security posture.