I have a spell that casts a magic effect, passing magnitude and duration. This magic effect has an attached script, and from inside this script I need to know the magnitude and duration passed by the spell (in real time would be better), so I can manipulate them.

I don't think there's a simple way to access those values, right? In this case, do you guys know any workaround to access that information?

Not sure that there isn't a way by default, but chances are you'll have to post a humble request to the SKSE thread for functions to access these variables, or have them exposed.