Links – start hacking

XSS
http://zseano.com/tut/4.html
http://brutelogic.com.br/blog/cheat-sheet

EXPLOITS
https://www.exploit-db.com
http://0day.today
https://packetstormsecurity.com

TUTORIALS
http://www.hackingtutorials.org

OTHERS
https://www.corelan.be
http://fuzzysecurity.com
http://www.darknet.org.uk
https://highon.coffee/blog
http://www.opensecuritytraining.info/Training.html
http://www.it-docs.net/categories
https://blog.g0tmi1k.com

Test your skills
https://lab.pentestit.ru
https://ctf365.com