In the past, Joomla released minor and major releases, which they called short and long term releases. Joomla 2.5, for example, was a long term release, and the 1.6 and 1.7 versions were it's preceeding short term releases. When version 3 became available, Joomla adopted an improved release cycle ensuring longer support for major versions. There are no longer short term and long term releases. Instead, releases are referred to as being “supported”, “current”, “legacy” or “stable”. Learn more about the Joomla release and support cycle.
The Joomla Project will no longer release any official patches for Joomla 2.5. That being said, at the time of this post, there are currently millions of Joomla 2.5 sites on the web. This even includes a portion of the Joomla.org family of websites. For those reasons, we are confident that a patch would be created should any major issues arise in the immediate future. We would be willing to contribute to a patch which would be applied to all Joomla 2.5 sites on the CloudAccess.net Platform.
It is recommended that you upgrade to Joomla 3 at some point in the very near future. The good news is that we’ve created Upgrading to Joomla 3, a guided video tutorial demonstrating the steps you’ll need to take to upgrade to Joomla 3.