A new WHMCS billing module has been released for SolusVM. The module contains important security fixes and we advise you to upgrade as soon as possible.
The module can be downloaded here http://docs.solusvm.com/v2/Default.htm#Modules/Billing/WHMCS/Installation.htm and the direct link to the module download is http://files.soluslabs.com/solusvm/modules/whmcs/solusvm_whmcsmodule_v3.17.zip
Regards
Soluslabs Security Team