Isso foi abordado na errata
Wand of Paralysis (p. 211). The third and fourth sentences now read as follows: “The target must succeed on a DC 15 Constitution saving throw or be paralyzed for 1 minute.”
O texto acima substitui o abaixo ...
Make a ranged attack roll against that creature using your spell attack bonus. On a hit, the target is paralyzed for 1 minute.