[wp-trac] [WordPress Trac] #31946: /wp-admin/user-edit.php fails when using with IDN domain name

[WordPress Trac]

#31946: /wp-admin/user-edit.php fails when using with IDN domain name
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 Reporter:  aesede        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Users         |    Version:  4.1.1
 Severity:  normal        |   Keywords:
  Focuses:                |
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 '''Steps to reproduce the problem:''' in a IDN-based domain site, logon to
 the admin area, go to Users in the main menu and click on edit any user.
 '''Domain is:''' gudñus.com.ar
 '''The exact URL is:''' http://gudñus.com.ar/wp-admin/user-
 edit.php?user_id=3&wp_http_referer=%2Fwp-admin%2Fusers.php
 If I reload the page without the wp_http_referer part of the querystring,
 it works.
 Other 4.1.1 WP installations I have work properly, the site with IDN
 domain is the only with problems.
 The bug results in a page showing next text:
 '''''Forbidden'''''

 ''You don't have permission to access /wp-admin/user-edit.php on this
 server.''

 ''Additionally, a 404 Not Found error was encountered while trying to use
 an ErrorDocument to handle the request.''

 '''Please notice again''', that if I take out the wp_http_referer part the
 page works, no "Forbidden" page is shown.

 '''Extra:''' Had similar problem (more severe, couldn't even login to /wp-
 admin) when installing wordpress in a folder with latin chars (like
 domain.com/gudñus/) but couldn't check in depth for that issue.

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Ticket URL: <https://core.trac.wordpress.org/ticket/31946>
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