Brainfuck : wordpress exploit choice : why this one ?

Hi guys,

I’m working on this box and if someone can explain the choice of the exploit from the wordpress list : WP Support Plus Responsive Ticket System 7.1.3 Privilege Escalation

Why this one ?

Why not to go for :

Authenticated JavaScript File Upload


Authenticated SQL injection


st Header Injection in Password Reset


Thank you

I dont know, maybe did you try all of them ?