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2 changes: 0 additions & 2 deletions docs/guides/server/hostname.adoc
Original file line number Diff line number Diff line change
Expand Up @@ -8,8 +8,6 @@ summary="Configure the frontend and backchannel endpoints exposed by {project_na
includedOptions="hostname hostname-* proxy"
deniedCategories="hostname_v1">

== The importance of setting the hostname option

By default, {project_name} mandates the configuration of the `hostname` option and does not dynamically resolve URLs. This is a security measure.

{project_name} freely discloses its own URLs, for instance through the OIDC Discovery endpoint, or as part of the password reset link in an email. If the hostname was dynamically interpreted from a hostname header, it could provide a potential attacker with an opportunity to manipulate a URL in the email, redirect a user to the attacker's fake domain, and steal sensitive data such as action tokens, passwords, etc.
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