The remote host is vulnerable to a Cross-Site Scripting (XSS) attack.
The remote host appears to be running PHPGroupWare, a groupware system implemented in PHP. This version is reported to be vulnerable to a cross-site scripting issue in the Wiki module. An attacker may steal cookie-based authentication credentials from a legitimate user by sending a malformed link to this web site.
Upgrade to PHPGroupWare 0.9.16.003 or higher.