Kunena forum extension for Joomla multiple reflected cross-site scripting vulnerabilities Class: Input Validation Error CVE N/A Remote Yes Local No Published 02/07/2014 Credit Raymond Rizk of Dionach (vulns@dionach.com) Vendor Kunena Vulnerable Kunena v3.0.5 Solution Status: Fixed by Vendor Kunena Forum is prone to multiple reflected cross-site scripting vulnerabilities because it fails to sufficiently sanitize user-supplied data. An attacker may leverage these issues to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site, steal cookie-based authentication credentials, and obtain sensitive information. Kunena v3.0.5 is known to be vulnerable. Earlier versions may also be vulnerable. To exploit this issue, an attacker must have a user account on the forum. The vulnerability affects all pages/tasks that use parameters in the form of parameter[]. Additionally, the file upload and profile image upload functionality are also vulnerable. This can be seen in the proof of concept example below: POST /index.php?option=com_kunena&view=home&defaultmenu=130&Itemid=12 Content-Disposition: form-data; name="avatarfile"; filename="<iframe src=javascript:alert('XSS')>" Vendor informed and a new version (3.0.6) was released on 28/07/2014. Vendor recommends updating Kunena to the latest version.