Today we have released WHMCS 8.1.2 which contains some targetted bug fixes for the 8.1 series of WHMCS.
These fixes address 5 issues identified since the previous release which we consider to have a moderate to high impact. We recommend applying this update if you are using email piping or accept credit card payments via WHMCS using any merchant gateway module.
To learn more about what's new in WHMCS 8.1, please visit https://www.whmcs.com/whats-new