It is not just the database information, server configuration that is leaked but including the payload of injecting to leverage the website’s vulnerability.
The vulnerability according to the hacker which he posted in detail is in: http://www.wmsu.edu.ph/XXXXX’
The paste also reveals the website’s database “web” has 115 tables, however the data of the tables are not included in the leak.
Click here if you want to check it yourself.