Netsparker identified a version disclosure (Tornado) in the target web server's HTTP response. Eclipse Tornado is a scalable, non-blocking web server and web application framework written in Python.
This information can help an attacker gain a greater understanding of the systems in use and potentially develop further attacks targeted at the specific version of Tornado.
Make use of
RequestHandler.clear_header() to prevent information leakage from the
SERVER header of its HTTP response: