Sitemagic CMS 2010.04.17 (SMExt) Remote Cross-Site Scripting Vulnerability Vendor: Sitemagic CMS Product web page: http://www.sitemagic.org Affected version: 2010.04.17 Summary: Sitemagic CMS is a fantastic new platform for building and maintaining great looking websites. It is very easy to set up and use, and is fully extendable and customizable. Desc: Sitemagic CMS suffers from a XSS vulnerability when parsing user input to the 'SMExt' parameter via GET method in 'index.php'. Attackers can exploit this weakness to execute arbitrary HTML and script code in a user's browser session. Tested on: Microsoft Windows XP Professional SP3 (EN) Apache 2.2.14 (Win32) PHP 5.3.1 MySQL 5.1.41 Vulnerability discovered by Gjoko 'LiquidWorm' Krstic liquidworm gmail com Zero Science Lab Advisory ID: ZSL-2011-5020 Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2011-5020.php 10.06.2011 PoC: http://localhost/index.php?SMExt="><script>alert('zsl')</script>