SQL Injection
Challenges to learn how to detect and exploit validation errors that allow injecting SQL into queries. From classic injection to blind and time-based.
CTF Labs · Free
Real web hacking challenges. For everyone.
Free online web hacking CTF platform. Test what you know against real environments. Each challenge is an authentic vulnerability you have to find, exploit and document. With difficulty levels, scoring from your first solve and a global ranking that shows who gets there first.
Challenges available
20+
Access
100% free
A platform to learn web hacking by doing
SixHack Academy CTF Labs are a collection of real web hacking challenges, designed so you can practice offensive techniques in a controlled and fully legal environment. They're not "textbook" exercises with artificial vulnerabilities: each challenge reproduces a real scenario like the ones you'd find in professional audits.
The platform covers the most relevant OWASP Top 10 techniques: SQL Injection, Cross-Site Scripting (XSS), IDOR, SSRF, path traversal, file upload and other common web vulnerabilities. Each challenge is built around something concrete: detection, exploitation, evidence and validation.
It runs in your browser, no installation or configuration. You sign up, spin up an environment and start hunting flags. Perfect if you want to get started in ethical hacking, if you're already a developer or sysadmin and want to see the offensive side, or if you're preparing for a technical security interview.
Vulnerabilities
What kind of challenges you'll find
A selection of the most relevant and in-demand web vulnerabilities in the industry.
Cross-Site Scripting
Practice reflected, stored and DOM-based XSS. Learn to bypass filters, encode payloads and craft chains to exploit the user's context.
Insecure Direct Object Reference
Detect access control flaws by changing identifiers in the URL or request body. One of the vulnerabilities with the highest real impact in production.
Server-Side Request Forgery
Learn to exploit features that issue server-side requests to access internal resources, read cloud metadata or pivot inside the internal network.
Path Traversal and LFI
Challenges where you have to break the file-serving logic to access disallowed paths, read sensitive system files or reach Local File Inclusion.
Malicious file uploads
Learn to bypass MIME-type, extension or magic-byte validation to upload files that end up executing on the server or exploiting the user's browser.
How it works
From zero to your first flag in four steps
No setup, no installations. You sign in, spin up the environment and start hacking.
01
Sign up free
Create your account on the platform. No cost, no credit card, no commitment of any kind.
02
Pick a challenge
Choose the level that fits your experience: Easy if you're starting, Medium if you already know, Hard if you want to push yourself.
03
Find the flag
Explore, analyze, exploit. Each challenge has a hidden flag that validates you've solved it correctly.
04
Climb the ranking
Every valid flag earns points. The first to solve a challenge gets the First Blood and stands out in the ranking.
Levels
Three difficulty levels
From entry-level challenges to puzzles that will test the most experienced.
To get started
Fundamental vulnerabilities and recognizable patterns. Ideal if you're learning or want to warm up before stepping up.
For those who know
More complex scenarios that require combining techniques or understanding context better. The turning point where real learning begins.
For those who want to suffer
Challenges built to test critical thinking and deep knowledge. Vulnerability chains, creative bypasses. Not everyone makes it.
What to expect
What CTF Labs are and what they're not
So you know exactly what you're getting into before signing up.
✓ What they are
- Real web hacking challenges with concrete flags
- Isolated, controlled and legal environments
- Global ranking with scoring and First Blood system
- Free access without a credit card
- Real OWASP Top 10 vulnerabilities
- A solid entry point into ethical hacking
× What they aren't
- Not a structured pentesting course
- No prior explanation of each vulnerability included
- Not a replacement for professional training or certifications
- Not programming or algorithm puzzles
- Not a bug bounty program with payouts
- You don't need to install complex tools
⚖️
Ethical, legal and responsible hacking
Every challenge runs in isolated environments specifically designed for learning. You spin up your own environment when you start a challenge. You're not attacking any real third-party system, there's no legal risk and the ethical framework of hacking is part of the training. The techniques you learn here should only be used on your own systems or with explicit written authorization.
FAQ
Frequently asked questions about CTF Labs
The most common questions before signing up to the platform.
What is a hacking CTF?
A CTF (Capture The Flag) is a security competition where participants must find
vulnerabilities in controlled applications and obtain a flag (a secret string) that proves they
solved the challenge. At SixHack Academy our CTFs focus on web hacking: SQL Injection,
XSS, IDOR, SSRF, path traversal and other OWASP Top 10 techniques.
Are the CTF Labs really free?
Yes, completely free. You only need to register, no credit card or commitment required. The platform
serves as a discovery tool: if you like the methodology, you can deepen your training with the
academy's full courses.
What is a First Blood in a CTF?
First Blood is a recognition awarded to the first person who solves a challenge after
it's published. The global ranking records who got each First Blood, adding an extra competitive
component for the fastest players.
What is a flag in a CTF?
A flag is a secret string you only obtain after correctly exploiting the challenge's
vulnerability. It usually has a recognizable format (like
SIXHACK{...}) and you submit it
on the platform to validate that you solved the challenge and earn ranking points.
How does the global ranking work?
Every solved challenge awards points based on its difficulty (Easy / Medium / Hard). The global
ranking updates in real time and shows all users sorted by score. Whoever gets First Blood on a
challenge receives extra points, rewarding speed and technical skill.
After CTFs, can I keep learning at the academy?
Absolutely, that's the idea. CTF Labs give you a taste of the methodology and help you spot your
knowledge gaps. For structured training from zero to professional auditor we have WXJ and
WXE, covering the full OWASP Top 10, audit methodology and professional reporting, all
with direct instructor support.
Like the format? This is just the beginning
CTF Labs are a sample of how we teach at SixHack Academy. The full courses are built with the same philosophy but with structured explanation, professional methodology, direct instructor support and verifiable certification at the end.
What are you waiting for?
Free signup. Instant access. No credit card, no commitment, no fine print.