Vaadin Framework 'JsonPaintTarget.addAttribute()' HTML Injection Vulnerability

Summary
This web application is running with the Vaadin Framework which is prone to a 'JsonPaintTarget.addAttribute()' HTML Injection vulnerability
Impact
Successful exploits will allow attacker-supplied HTML and script code to run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or control how the site is rendered to the user. Other attacks are also possible.
Solution
Upgrade to Vaadin Framework version 6.8.8 or later For updates refer to http://www.vaadin.com/releases
Insight
Vaadin Framework is prone to an HTML-injection vulnerability because it fails to properly sanitize user-supplied input.
Affected
Vaadin Framework versions from 6.0.0 up to 6.8.7
Detection
Check the version.
References