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Joomla Kunena Forum 3.0.5 Cross Site Scripting

Joomla Kunena Forum 3.0.5 Cross Site Scripting
Posted Jul 30, 2014
Authored by Dionach

Joomla Kunena Forum extension version 3.0.5 suffers from cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
MD5 | 9e0c7dbb10bbd35dcff9281c87ebad14

Joomla Kunena Forum 3.0.5 Cross Site Scripting

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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.
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