Source: xenforo.com/community/threads/…ry-2-1-5-released.171922/XenForo 2.1.5 Released
XenForo 2.1.5 is now available for all licensed customers to download. We recommend that all customers running previous versions of XenForo 2.1 upgrade to this release to benefit from increased stability.
Download XenForo 2.1.5
Upgrade directly from within your control panel
Some of the changes in XF...
XenForo and Media Gallery 2.1.5 released