|Be advised that Cumulative Update 2 for Exchange Server 2013 was re-released today. This re-release fixes a serious permission issue when moving modern public folders mailboxes around, as described by the Exchange team here.
The knowledge base article KB2859928 and download link are kept identical to the original CU2. Only the version number has been increased a notch and your Exchange 2013 version number will become 15.0.712.24 when installed.
For more information on changes already incorporated in the original CU2, check here.
As with any Hotfix, Rollup, Service Pack or Cumulative Update, I’d recommend to thoroughly test this in a test and acceptance environment first, prior to implementing it in production (as this re-release proves).
You can download the re-release of Exchange 2013 Cumulative Update 2 here.