Knowledge Lab
Technical guides, methodologies and resources to master bug bounty. Learn ethical hacking techniques with hands-on content.
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Learn to identify and exploit IDOR (Insecure Direct Object Reference) vulnerabilities in web applications. From the basics to writing effective reports.
Everything you need to build a professional bug bounty setup: from choosing your operating system to automating reconnaissance.
A complete guide to getting started on HackerOne: from creating your account to submitting your first vulnerability report. Tips for beginners.
Take your reconnaissance phase to the next level with advanced techniques for subdomain enumeration, JavaScript file analysis, GitHub dorking and automation.
Explore the most common techniques for attacking insecure JSON Web Token implementations: from the none algorithm to JKU/JWK injection.
Learn to escalate SSRF vulnerabilities from a low severity to critical impact. Exploitation techniques, filter bypasses and attack chains in cloud environments.
What bug bounty is, how a program works step by step, which platforms it runs on (HackerOne, Bugcrowd, Intigriti, YesWeHack), how much you earn, whether it's legal and where to start from scratch.
What bug bounty really pays: average rewards by vulnerability type and severity, what top hunters earn, the reality for beginners and why most people don't make a living from it.
The OWASP Top 10 explained category by category, with real examples: broken access control, injections, SSRF, cryptographic failures and more. With links to the theory and hands-on labs for each flaw.
Where to practice web hacking legally: 30+ platforms and labs ordered by level — BBLABS, PortSwigger, Hack The Box, TryHackMe, OWASP Juice Shop, Root Me and many more. Honest and useful.
How to become an ethical hacker from scratch with no prior experience: what it is, whether you need to program, whether it's legal and the step-by-step roadmap (fundamentals → web → OWASP Top 10 → labs → first bug bounty). With realistic timelines and the mistakes that hold you back.
Burp Suite tutorial from scratch: what it is, installing and configuring the proxy (127.0.0.1:8080 + CA certificate), Proxy/Intercept, Repeater, Intruder, Decoder, useful extensions, Community vs Pro and a real hunting workflow.
OSCP guide: what it is, what the exam evaluates (infrastructure pentest, Active Directory, 24h + report), who it's for, how to prepare, OSCP vs eJPT vs eWPT and why it's infrastructure pentesting, not web bug bounty (complementary).
Google Dorks guide for bug bounty: what they are, the operators (site:, inurl:, intitle:, filetype:, ext:, intext:), ready-to-use examples for info exposure, panels, sensitive files and subdomains, ethical use within scope and how they fit into your recon.
How much an ethical hacker or pentester earns in Spain in 2026: salary ranges by seniority (junior, mid, senior, red team), the difference between an employment salary and bug bounty income, career paths and how to land your first job.
Step-by-step sqlmap tutorial: detect and exploit SQL injections with -u, list databases with --dbs, dump tables with -D/-T/--dump, automate with --batch, tune --level/--risk, evade WAFs with tamper scripts and reach --os-shell. Always within an authorized scope.
ffuf tutorial: fuzzing directories, subdomains/vhosts and GET/POST parameters, how to filter noise with -fc/-fs and calibrate with -mc/-ac, SecLists wordlists and when to use gobuster or dirsearch as alternatives.
Nuclei tutorial: what it is, how to run scans with -t and -severity, keep templates up to date, write your own YAML template and chain it with recon (subfinder | httpx | nuclei) to scan at scale without drowning in false positives.
The essential bug bounty tool stack for 2026: proxy (Burp Suite/Caido), exploitation (sqlmap), fuzzing (ffuf/gobuster), scanning (nuclei), recon (subfinder, amass, httpx, waybackurls/gau) and intelligence (Shodan). What each does, when to use it and how they fit together.
An honest comparison of the best offensive cybersecurity certifications in 2026: OSCP, eJPT, eWPT/eWPTX, CEH, PNPT and OSWE. What they are, who each is for, which to choose based on your goal (employment, web pentesting, bug bounty) and a suggested path without the hype.
What HTTP Request Smuggling is, why it happens, its CL.TE, TE.CL and TE.TE variants, how to detect it with timing and differential techniques, its impact (bypassing controls, cache poisoning, request stealing) and how to test it with Burp's HTTP Request Smuggler extension.
What a WAF is, how to fingerprint it and the most-used bypass techniques —encoding, case toggling, inline comments, HPP, chunked encoding and alternative payloads— applied to XSS and SQL injection. A practical and strictly ethical approach, within scope.
What prompt injection is (direct and indirect), how it relates to jailbreaks and data exfiltration via LLMs, the OWASP Top 10 for LLMs, how this surface shows up in the bug bounty of AI-powered applications and how to test it responsibly.