Bug Bounty for Beginners — Tips to Start the Journey of Finding the Hole with Ethics

Bug bounties are programs run by companies or platforms such as HackerOne, Bugcrowd, and Intigriti, where they give explicit permission to security researchers to test their systems. If we find a valid vulnerability, we will get a reward. This could be cash, swag, or even a Hall of Fame. But what is more valuable in my opinion is experience: we learn to read real applications, understand business logic, and write reports that engineers can understand.

What is a Bug Bounty, Actually?

Imagine you park your car in a public area. There was a sign saying, "Please check the security of the doors and windows. If you find a way in, report it to us and get a reward." That's the whole point of bug bounties. The company says, "You can test our systems, but only in areas we specify, and do not store sensitive data that you find."

This program is different from classic penetration testing which is usually carried out on a paid contract. In the bug bounty, anyone can join — from beginners who are new to the OWASP Top 10, to senior researchers who focus on SSRF or deserialization chain. Rewards also vary: from $50 for low severity bugs, to tens of thousands of dollars for remote code execution.

Why is Bug Bounty Suitable for Beginners?

Learning cyber security without a real target feels like learning to swim in a waterless pool. The theory about XSS, SQL injection, or IDOR is indeed important, but when we first see a login form in a real application, our brains often go blank. Bug bounties provide legal, real-world, and diverse targets.

Basic Tools You Need to Master

You don't need to buy expensive tools to get started. Most of the things we need are free and open-source. Here is a "little bag" that I often use when I want to join a new program.

• Browser + Burp Suite Community: to intercept requests, modify parameters, and test input validation.
• FFUF or Gobuster: directory fuzzing to find hidden endpoints.
• Nmap: port scanning on targets allowing infrastructure testing.
• Subfinder or Amass: recon subdomains so we don't just test the main domain.
• Wayback Machine or gau: looks for old URLs that may still be alive and vulnerable.
• Terminal and shell scripting: for automating recon data pipelines.

A simple example of a recon pipeline for collecting historical subdomains and URLs:

# Kumpulkan subdomain aktif
subfinder -d target.com -o subs.txt

# Cek yang benar-benar hidup
httpx -l subs.txt -o live-subs.txt

# Ambil URL historis dari Wayback
gau -subs live-subs.txt > urls.txt

# Filter parameter yang menarik
cat urls.txt | grep -E '\?|=' | sort -u > params.txt

The above script is not a guarantee of finding bugs, but it at least gives us a clearer map. Like a detective compiling a wall full of photos and threads, recon helps us see patterns.

Simple Workflow from Recon to Report

Start by reading the program's scope and policy. Never test domains or features outside the whitelist. Like guests in someone's house, we can only enter rooms whose doors are open for us.

1. Reconnaissance: identify domains, subdomains, technologies, and endpoints. Use tools wisely.
2. Mapping: create a list of application features: login, register, upload, reset password, dashboard, API, etc.
3. Testing: test input points one by one. Starting from low-hanging fruit such as XSS, IDOR, and open redirect.
4. Chain: sometimes one small bug is not dangerous, but if combined with other bugs it can be critical.
5. Report: write reproduction, impact and mitigation steps in polite and clear language.

A simple report template that I usually use:

Title: Reflected XSS di Endpoint /search?q=
Severity: Medium
URL: https://target.com/search?q=<payload>
Steps to Reproduce:
1. Buka https://target.com/search?q=<img src=x onerror=alert(1)>
2. Perhatikan alert(1) muncul.

Impact:
Penyerang bisa mengeksekusi JavaScript di browser korban yang sedang login.

Mitigation:
Escape output dan implement Content Security Policy (CSP) yang ketat.

Ethics and Boundaries That Should Not Be Violated

A bug bounty is not a license to do anything. There are unwritten rules that are more important than the bounty itself: do not destroy, do not access other people's data, and do not exploit after the report has been sent unless requested.

I've heard stories of novice researchers who rushed to send a malicious payload to production, then left the target database full of junk data. It's not a bug bounty; it's vandalism. If you find a loophole that has the potential to corrupt data, stop testing, document it with minimal evidence, and report it.

Some programs also prohibit the use of automated exploitation without permission, especially for brute-force, denial of service, or social engineering. Always read the policy to the end. Not because we want to be smart, but because we want to be invited back to the party.

Conclusion

Bug bounties are a great bridge to move from "learning theory" to "practicing in the field". You don't need to be a master to get started. Start with beginner-friendly programs, choose targets with a broad scope, and focus on classic bugs such as XSS, IDOR, or information disclosure. Every report you write — even if it gets rejected — will teach you something.

For those like me, who used to only read about CVEs and wonder what it would be like to find a vulnerability, a bug bounty is an invitation to sit at the same table as engineers from big companies. As long as we remain ethical, every loophole we find is not just a number in our account, but also proof that we have begun to understand the language of the system.

If you have tried bug bounties, share your first experience in the comments column. We can learn together — including from reports that end up duplicate.