You are running Bugzilla 4.2.3, but several security fixes have been made available since this version, see http://www.bugzilla.org/security/. There are also numerous bug fixes, see http://www.bugzilla.org/releases/4.2.7/release-notes.html. You should upgrade Bugzilla to 4.2.7 or 4.4.1.
As cloning of this Bugzilla installation into LibreOffice product only instance is planned (https://wiki.documentfoundation.org/QA/Bugzilla/LibreOffice_Bugzilla_Proposal), please consider upgrading sooner than later to give it a secure start. @Qubit: adding you to the CC list.
Upgraded to 4.4.5
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