Werk #11747: Fix stored XSS triggered by received syslog messages

Component Event Console
Title Fix stored XSS triggered by received syslog messages
Date Dec 3, 2020
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 1.6.0p20 2.1.0i1 2.0.0b2
Level Prominent Change
Class Security Fix
Compatibility Compatible - no manual interaction needed

You are only affected by this issue in case you use the Event Console.

An attacker could send messages to the Event Console, e.g. via syslog, containing arbitrary HTML code. This was executed in the browser context of any user viewing the event in the Checkmk user interface.

The information is now properly escaped in a generic way to prevent these issues.

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