Joomla! 2.5.28 is now available, this is a maintenance release for the 2.5 series of Joomla! and is the final scheduled release of the series. Support for Joomla! 2.5 is scheduled to end on December 31, 2014.
click here for full release information.
2.5 End of Life Update: Support for Joomla! 2.5 is scheduled to end on December 31, 2014
We are familiar with the implementation of the upgrade and are currently upgrading multiple sites CONTACT US fora free proposal to update your site.