Doubtful that particular vulnerability will affect VFP as it uses Microsoft's XML libraries, which are not the same ones that Python uses.
>Found this interesting XML attack against Python:
>
https://pypi.python.org/pypi/defusedxml>
>Curious if VFP's native XML functions have any vulnerabilities?
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer