Werk #6622: Fixed possible open redirect on login page

Component	User interface
Title	Fixed possible open redirect on login page
Date	Sep 17, 2018
Level	Trivial Change
Class	Security Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.5.0p5 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.4.0p36 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

It was possible to redirect an user to external websites through manipulating GET parameters. To exploit this vulnerability, an attacker needs to trick a user into following a crafted URL. The attack only works if the user does not notice that he is redirected to a different URL.

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