issue2550925 strip HTTP_PROXY environment variable if deployed as CGI and client sends an http PROXY header, the tainted HTTP_PROXY environment variable is created. It can affect calls using requests package or curl. A roundup admin would have to write detectors/extensions that use these mechanisms. Not exploitable in default config. See: https://httpoxy.org/

try:
    # Python 3+.
    from xmlrpc import client, server
    server.SimpleXMLRPCDispatcher
except (ImportError, AttributeError):
    # Python 2.
    import xmlrpclib as client
    import SimpleXMLRPCServer as server