That would depend on your server's config; your script's location; the security of whatever admin capability is public-facing; and the phase of the moon... or the first three digits of tomorrow's winning lottery number.

The first three are serious; the latter two are just to suggest (if the first three failed to make the point) that your question is so broad; so without definition; that a serious answer is nearly impossible.

And when you've provided enough specificity to make a real answer possible, you might want to ask yourself if what's in or done by your script that justifies your paranoia. The answers to that may suggest ways to avoid/work-around whatever issues exist.