source: https://www.securityfocus.com/bid/65740/info

eshtery CMS is prone to a local file-disclosure vulnerability because it fails to adequately validate user-supplied input.

Exploiting this vulnerability would allow an attacker to obtain potentially sensitive information from local files on computers running the vulnerable application. This may aid in further attacks. 

 http://www.example.com/[path]/FileManager.aspx?file=E:\web\admin.asp