Comment by chrismorgan

3 years ago

I don’t know what specifically you’re speaking of, but for the stuff I know of, Mastodon uses WebFinger, which puts the important stuff inside /.well-known/, and .well-known should be blacklisted as a “username” in any of these sorts of systems, for this very reason. (https://www.rfc-editor.org/rfc/rfc8615 specifies the /.well-known/ path prefix.)

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