Offensive Security

Web Training Environments

Alert to win	Attack-Defense	Buggy Web App bWAPP	Certified Secure
Ctftime	CTF Writeups from IgniteTechnologies	CryptoHack	CMD Challenge
Exploitation Education	flAWS Cloud vulnerable app	Google CTF	Hackaflag BR
HackTheBox !	Hackthis	Hacksplaining	Hacker101
Hacker Security	Hacking-Lab	HackXpert	HSTRIKE
ImmersiveLabs	KaliTut Linux and Pentesting blog !	LetsDefend	NewbieContest
Nightmare - learn binary exploitation / reverse engineering skills	OSBOXES	OverTheWire !	OWASP Vulnerable-Web-Applications-Directory
Practical Pentest Labs	Pentesterlab!	Penetration Testing Practice Labs	PicoCTF !
PortSwigger Web Security Academy	PWNABLE	Pwn college Web Security	RangeForce
Ringzer0 CTF	Root-Me	Root in Jail	SANS Challenger
Security Knowledge Framework	SmashTheStack	TCM Security Academy !	The Cryptopals Crypto Challenges
Tryhackme	Vulnhub !	W3Challs	WeChall
XSS Challenges from @moeinfatehi	Zenk-Security	Zero-Point Security	Vulnlab

System Exploit Development

https://exploit.education/	https://ir0nstone.gitbook.io/notes/	https://pwn.college