We have published new maintenance releases for the 5.1 and 5.2 versions of WHMCS.
The updates provided within these releases are maintenance related and do not address any security concerns. Therefore there is no immediate urgency to apply them.
Which Update Do I Need?
If you are running version 5.2.13, you may apply the 5.2.14 Patch Set.
If you are running version 5.1.14, you may apply the 5.1.15 Patch Set *OR* upgrade using the latest 5.2 Full Release.
If you are running any other version, you...
Read more @ http://blog.whmcs.com/?t=82298