ASP.NET 2.0 includes site navigation features including sitemaps, automatic generation of "breadcrumb" links on pages, etc. An ASP.NET 2.0 application can include a file named web.sitemap within the application root. This file is meant to be used on the back-end to drive the site navigation features and should never be accessible remotely.
The web.sitemap file contains a list of links on the server that can be used by malicious users to gather information about hidden pages within the web application.
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