Unfixed XSS vulnerability at www.hotel-pension-theresia.at

Security researcher Cr4t3r, has submitted on 09/02/2012 a cross-site-scripting (XSS) vulnerability affecting www.hotel-pension-theresia.at, which at the time of submission ranked 9021362 on the web according to Alexa.
We manually validated and published a mirror of this vulnerability on 16/02/2012. It is currently unfixed.
If you believe that this security issue has been corrected, please send us an e-mail.

Vulnerable URL: http://www.hotel-pension-theresia.at/guestbook/admin/guestbook.admin.php?action=settings&guestbook_id=0&language=english&gmt_ofs=0http://www.haus-unterberg.at/admin/gaestebuch/admin/guestbook.admin.php?action=settings&guestbook_id=0&language=german&gmt_ofs=0"><script>alert(String.fromCharCode(67,114,52,116,51,114,32,87,97,115,32,72,101,114,101))</script>