In that link above, there's a link to a ZDNet article, and apparently they got a response from Microsoft on the matter.
We recently became aware of a hack that purportedly aims to provide security updates to Windows XP customers. The security updates that could be installed are intended for Windows Embedded and Windows Server 2003 customers and do not fully protect Windows XP customers. Windows XP customers also run a significant risk of functionality issues with their machines if they install these updates, as they are not tested against Windows XP. The best way for Windows XP customers to protect their systems is to upgrade to a more modern operating system, like Windows 7 or Windows 8.1.
While I don't necessarily think this is ♥♥♥♥♥♥♥♥, I'd have to kinda say I agree with Microsoft in case anything goes wrong on an XP machine, since these updates weren't made originally for XP. However, it'd be something for me to definitely try out sometime in a virtual machine, or even my mother's old laptop.