CVE-2019-25027 : Vulnerability Insights and Analysis

A vulnerability in the default RouteNotFoundError view in Vaadin versions 10.0.0 through 10.0.13 and 11.0.0 through 13.0.5 allows attackers to execute malicious JavaScript through a specially crafted URL.

Understanding CVE-2019-25027

This CVE involves a reflected cross-site scripting vulnerability in Vaadin 10 and 11-13.

What is CVE-2019-25027?

The default RouteNotFoundError view in Vaadin versions lacks proper output sanitization, enabling attackers to execute malicious JavaScript via a crafted URL.

The Impact of CVE-2019-25027

The vulnerability has a CVSS base score of 6.1, with medium severity. It requires user interaction and can lead to the execution of malicious scripts.

Technical Details of CVE-2019-25027

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The default RouteNotFoundError view in Vaadin versions 10.0.0 through 10.0.13 and 11.0.0 through 13.0.5 lacks proper output sanitization, allowing attackers to execute malicious JavaScript.

Affected Systems and Versions

Vaadin 10.0.0 through 10.0.13
Vaadin 11.0.0 through 13.0.5

Exploitation Mechanism

Attackers can exploit this vulnerability by using a specially crafted URL to inject and execute malicious JavaScript.

Mitigation and Prevention

Protecting systems from CVE-2019-25027 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Vaadin promptly.
Implement input validation and output encoding to prevent XSS attacks.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Conduct security testing and code reviews to identify and mitigate potential security flaws.

Patching and Updates

Stay informed about security updates and advisories from Vaadin.
Ensure all Vaadin software components are up to date to mitigate the risk of exploitation.