Cross-Site Scripting (XSS) in Redaxo

High-Tech Bridge Security Research Lab has discovered vulnerability in Redaxo, which can be exploited to perform Cross-Site Scripting (XSS) attacks.

1. Cross-Site Scripting (XSS) in Redaxo: CVE-2012-3869
   1.1 Input passed via the “subpage” GET parameter to /redaxo/index.php (when “page” is set to “user” or “template”) is not properly sanitised before being returned to the user.
   This can be exploited to execute arbitrary HTML and script code in administrator’s browser session in context of affected website.
   The following PoC (Proof of Concept) demonstrate the vulnerability:
   http://[host]/redaxo/index.php?page=user&subpage=%22%3E%3Cscript%3Ealert%28d ocument.cookie%29;%3C/script%3E
   http://[host]/redaxo/index.php?page=templat e&subpage=%22%3E%3Cscript%3Ealert%28document.cookie%29;%3C/script%3E