This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of HP SiteScope. Authentication is not required to exploit this vulnerability.
The specific flaw exists because HP SiteScope allows unauthenticated SOAP calls to be made to the SiteScope service. One of those calls is create() which allows unauthenticated user to create a new user account for the service. This account has access to an DownloadFilesHandler which contains a flaw that allows you to download any file from the server inclusing the server configuration files that contains the admin credentials. This can lead to remote code execution under the context of the current process.