LiveOverflow - Youtube channel with lots of learning content about web vulnerabilities, binary exploitation, CTF writeups, game hacking, etc.
/r/netsec - Subreddit with lots of technical blog posts.
WeChall - Site which compiles a ton of other sites which provide hacking training challenges you can complete to grow your skills.
pwn.college - Resources from a class at Arizona State University — They have a comprehensive binary exploitation CTF.
Institute for Cybersecurity and Digital Trust - An Ohio State institute founded in 2020 which reflects the University’s focus on cybersecurity.
Cybersecurity Canon - A curated list of excellent cybersecurity books.
Cybersecurity Guide - Website with information about undergraduate and graduate degrees, careers, certifications, and security clearances to get a better idea of what the field of cybersecurity encompasses.
/r/hacking - Subreddit with blog posts as well as more beginner discussion.
@CVEnew - Twitter account listing all new Common Vulnerabilities and Exposures.
@CVEannounce - Twitter account releasing information about high-profile CVEs. Often more helpful than @CVEnew because @CVEannounce links to blog posts and technical analyses, while @CVEnew might just have the bare minimum information for a vulnerability that isn’t public yet.
Phrack - an old school hacking zine where many foundational hacking techniques were originally shared.
PoC||GTFO - a hacking journal where people post and demonstrate various tricks - for example, the file for issue 17 is a valid PDF, a valid ZIP, and valid firmware for the Apollo Guidance Computer!
Paged Out! - a modern computer security magazine with 1-page articles.