Worldwide, Joomla 2.5.28 (latest version of 2.5) has been unsupported since December 2014 and no further security upgrades will be issued. At Sitecats we employ extra security on your 2.5 site which may buy a little extra time. We’re estimating August 1, 2015. Although it is unlikely, if hackers break Joomla 2.5 worldwide before that time, immediate measures will be taken to get all 2.5 sites off the server, converted, upgraded or downgraded to HTML. We’ve been through this upgrade hassle before, so please respect that our estimate is accurate, and your attention and decision need to be made as soon as possible.