Day 81 comes with some readings Host header injection to sql injection and some recon with intrigue io .
From Host Header injection to SQL injection
Recon with Intrigue IO
From Sam (CoffeeJunkie). Checking out different recon frameworks, I got astonished on how useful intrigue.io can become. It has several modules to do recon, in this case I tried to do subdomain brute force. Besides that you can run it on docker!