As released at the end of September, 2014, Joomla! 2.5.25 & 3.3.4 came out to fixed some security issues which were represented as medium priority. However, for a short time of using, these 2 Joomla versions have been meet with other serious security issues. Therefore, Joomla! 2.5.26 and 3.3.5 have been released soon.
Continuing with the release for the 2.5 and 3.x series of Joomla and addressing with generated issues, Joomla! 2.5.25 & 3.3.4 have been released. The 2 new Joomla versions significantly deal with the security issue that you must seriously consider to update your Joomla version for safety.