Security update for otrs (moderate)

This update for otrs fixes the following issues:

Update to version 4.0.33.

Security issues fixed:

• CVE-2018-19141: Fixed privilege escalation, that an attacker who is
  logged into OTRS as an admin user cannot manipulate the URL to cause
  execution of JavaScript in the context of OTRS.
• CVE-2018-19143: Fixed remote file deletion, that an attacker who is
  logged into OTRS as a user cannot manipulate the submission form to
  cause deletion of arbitrary files that the OTRS web server user has
  write access to.

Non-security issues fixed:

• Full release notes can be found at:
  • <a href=“https://community.otrs.com/release-notes-otrs-4-patch-level-33/”>https://community.otrs.com/release-notes-otrs-4-patch-level-33/</a>