Capture the flag
CTF Arena
Stay on Cyberlium — solve challenges here, submit flags, and XP updates the same account on the main site and ctf.cyberlium.com.Sign in so XP lands on your account.
How to solve a CTF challenge
- 1
Sign in
You must be logged in to earn XP. Without sign-in you can still read challenges, but flags won’t save progress.
- 2
Open a challenge
Browse the CTF list. Each card shows category, difficulty, and XP. Tap Open challenge.
- 3
Read the problem
The description tells you what to find. Use any flag hint (e.g. format CYBERLIUM{…}). Related Cyberlium lessons may help.
- 4
Find the flag
Solve the puzzle from the description (or linked on-site lesson). Flags look like CYBERLIUM{something_here}.
- 5
Submit the flag
Paste it in the Flag box and Submit. Correct = XP on your account. Wrong = try again. Solved challenges show a green check.
- Web·Easy100 XP
Login Bypass Warm-up
Practice spotting classic auth mistakes. Use only the intentional lab environment linked from Web Security lessons—never real sites.
Hint: Format: CYBERLIUM{...}
Related Cyberlium lesson - Web·Medium200 XP
SQLi Filter Dodge
Work through the SQL Injection lab flow and recover a practice flag from an intentional vulnerable query path.
Hint: Look for the lab confirmation string after the parameterized-query contrast.
Related Cyberlium lesson - Web·Easy150 XP
Reflected XSS Spotter
Identify unsafe reflection sinks in the XSS Challenge lesson and document a safe educational payload.
Related Cyberlium lesson - Crypto·Easy100 XP
Hash Crack Mini
Crack only digests you create yourself in the hashing lab. Ethical practice only.
Related Cyberlium lesson - Web·Hard300 XP
SSRF Reachability Map
Complete the SSRF lab checklist and map which internal endpoints would be dangerous if a URL fetch were user-controlled.
Related Cyberlium lesson