Cross-site scripting (XSS) vulnerability in admin/index.php in Helios Calendar 1.2.1 Beta allows remote attackers to inject arbitrary web script or HTML via the username parameter. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

More... (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-5952)