Even as a final paper for an undergraduate class, this is pretty light on details and doesn't appear to have even undergone basic editing. The "exploit" is only a couple pages of bare discussion that's very similar to the defaultnamehere discussion of Facebook Messenger from over a year ago.

Given the skimpy details and lack of citation of the exploit's inspiration... I'd probably give this a C- at best. I really wish people in CS would ask friends to peer review their writing, because a lot of writing (not all, but a lot) is awful.