((full)) - X-aspnetmvc-version

protected void Application_EndRequest()

In the client-server web model, HTTP headers convey metadata about requests and responses. Most production web applications strive to minimize revealing internal infrastructure details. However, default configurations of ASP.NET MVC (versions 3 through 5) implicitly add the X-AspNetMvc-Version header to every HTTP response. This value corresponds directly to the version of the System.Web.Mvc assembly used. x-aspnetmvc-version

Abstract: The X-AspNetMvc-Version HTTP header is a custom response header automatically injected by ASP.NET MVC frameworks. While intended to aid debugging and runtime environment identification, this header constitutes a form of information disclosure that can aid malicious actors in reconnaissance. This paper examines the header’s origin, technical function, associated security risks, and industry-standard mitigation techniques. associated security risks