5e doesn't allow that, it's a Larian house rule.

To use a spell scroll you have to have that spell on your class spell list. If the spell is of higher level than is available for you to cast, even Wizards have to roll an Intelligence check to successfully cast it or the spell simply disappears from the scroll.

Yeah, it's a bit of a cheap feeling when any class can be a Wizard or a Cleric with just consumable items. I hope they change that soon.