CTF & training
Registering and submitting flags on the CTF
The CTF (ctf.cyber-guardians.co.uk) is a separate, self-contained platform from the client portal — it uses its own username and password, not your portal login. Challenges are attempted directly against training.cyber-guardians.co.uk (the isolated Juice Shop instance), and the flag you find there is submitted back on the CTF platform to score points.
Steps
Work through these in order.
- 01
Register a CTF account first
Visit ctf.cyber-guardians.co.uk and register with any username and password — no email verification step, so you can start immediately.
- 02
Attack the target, not the scoreboard
Challenges are solved against training.cyber-guardians.co.uk. The CTF platform itself has no vulnerabilities to find — it only tracks and scores the flags you submit.
- 03
Copy flags exactly
Flags are case-sensitive hex strings. A flag that looks right but isn’t accepted usually has a stray trailing space or a missed character from a copy-paste — retype it manually if in doubt.
- 04
Remember the target resets nightly
training.cyber-guardians.co.uk resets every night at 03:00 UTC. Any state you’ve built up mid-challenge (e.g. a logged-in session, uploaded files) will be gone after a reset — this is intentional and doesn’t affect flags already submitted.
Not resolved?
Get in touch directly.
Stuck on a specific challenge is normal — that’s the format. If something looks actually broken (the target is unreachable, the CTF platform itself errors out), let us know and we’ll check the infrastructure.