Werk #6567: Fixed possible XSS on activate changes page

Component	Setup
Title	Fixed possible XSS on activate changes page
Date	Sep 13, 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

It was possible to trigger an XSS issue using the change messages in some situations.

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