Drupal versions 7.27 and Drupal 6.31 which are currently obtainable for download, including several fixes for security susceptibilities.
Drupal is an open source podium maintained and built by a community of 630,000+ users and developers. The quality of Drupal’s open development model implies that people are continually working to ensure Drupal is a progressive podium that maintains the most recent technologies that the Web has to proffer.
Drupal is employed as a back-end structure for no less than 2.1% of all websites globally ranging from personal blogs to political, corporate and government sites including data.gov.uk and whitehouse.gov. It is also employed for business partnership and knowledge management.
The security releases bring in small API changes which may need code updates on sites that uncover Ajax or multi-step forms to unspecified users, and where the forms are exhibited on pages that are cached (either by Drupal or by an external system).
Even though there are no latest features or non-security-related bug fixes in these releases, Drupal “strongly suggest” that users of both Drupal 7 and Drupal 6 download these security updates.
To examine the particulars of each security boost, you can look into the Drupal 7.27 release notes and the Drupal 6.31 release notes.