Werk #13066: Fix path traversal vulnerability

Component	Setup
Title	Fix path traversal vulnerability
Date	Jul 23, 2021
Level	Trivial Change
Class	Security Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 2.0.0p9 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.6.0p25 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

An authenticated user was able to enumerate the filesystem, accessible to the siteuser. No file contents were disclosed.

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