Rating:

An exposed Apache JServ Protocol server allows an attacker to proxy requests to Tomcat server running Jolokia. The Jolokia instance allows the attacker to create user accounts and grant manager rights.

Mirror here: https://nusgreyhats.org/write-ups/hitbgsecquals2018-babynya/

Original writeup (https://nandynarwhals.org/hitbgsecquals2018-babynya/).