I stumbled upon a new platform called HackCubes (hackcubes.com) that has an invite-style challenge, kind of like the one HackTheBox used to have back in the day. It’s still pretty new, so I’m curious to see how it turns out — I’m planning to give it a try just for fun, they are giving away free APPsec exam vouchers.

It reminded me of another CTF platform that’s been around for a while now, ParrotCTF (parrotctf.com), which some of you might have already checked out. Has anyone else here tried either of these kinds of invite challenges lately?