Information moved from a blog post by Aggression25:
I haven't gotten to the manga, but does anyone suspect the Beast Titan to be subject to the same vulnerability as the other Titans?
Answer by JinxTheFunhouse:
--Spoiler--It did say "So you know we're in the neck" so yes I would assume it is also vulnerable to this weakness. No Titan that isnt vulnerable to it has been shown so far.