The Kunena Extension for Joomla! is prone to a multiple cross-site-scripting Vulnerabilities because it fails to properly sanitize user-supplied input.
An attacker may leverage these issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. These may allow the attacker to steal cookie-based authentication credentials and launch other attacks.
Kunena extension 5.0.2 through 5.0.4 are vulnerable.
Information
Kunena Kunena 5.0.3
Kunena Kunena 5.0.2
Exploit
An attacker can exploit these issues using a web browser.