Vulnerability ID: HTB22370 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_gpeasy_cms.html Product: gpEasy CMS Vendor: gpeasy Vulnerable Version: 1.6.2 and Probably Prior Versions Vendor Notification: 05 May 2010 Vulnerability Type: XSS (Cross Site Scripting) Status: Fixed by Vendor 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 "include/tool/editing_files.php" script to properly sanitize user-supplied input in "gpcontent" 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 method="POST" action="http://example.com/index.php/Home"; name="myfrm"> <input type="hidden" name="cmd" value='save'> <input type="hidden" name="gpcontent" value='text"><script>alert(document.cookie)</script>'> </form> <script> document.myfrm.submit(); </script> Solution: Upgrade to the most recent verison
