The Error Logging Modules and Handlers (ELMAH [elmah.axd]) HTTP Module was found to be available. This module can leak a significant amount of valuable information.
SolutionConsider whether or not ELMAH is actually required in production, if it isn't then disable it. If it is then ensure access to it requires authentication and authorization. See also: https://elmah.github.io/a/securing-error-log-pages/