We have been made aware of an exploit in the SolusVM WHMCS module. We thought we’d inform you as SolusVM are not able to email you directly. Please find the following information on their blog and take the necessary action to protect yourselves if you are using this module.
http://blog.soluslabs.com/2013/06/24/important-security-alert-whmcs-module/
“We have been made aware of a potential security issue with our WHMCS Billing Module. We suggest you disable the module and rename/delete the /modules/servers/solusvmpro folder as soon as possible.
A new module will be released shortly to patch the security problem.”