Real bug bounty reports: learn from the best

A bug bounty report is the document a hunter submits to a program (on HackerOne, Bugcrowd, Intigriti, YesWeHack or a private program) describing a vulnerability they found in its scope. If triage accepts the report as valid and in-impact, the program pays a reward (bounty) proportional to the severity.

Every platform has its own template, but the skeleton is always the same. Standard structure:

• TitleA descriptive one-liner: vulnerability + affected endpoint or component. E.g. `Stored XSS in /profile/bio via crafted SVG`.
• Summary1-2 paragraphs summarizing what you found, where, and why it matters. No technical details yet.
• Steps to ReproduceA numbered, exact list so the security team can reproduce the bug in under 5 minutes. Include URLs, payloads, headers, curl commands.
• Proof of Concept (PoC)Screenshots, raw request/response, optional video. This is where you prove real impact, not speculate.
• ImpactThe real-world consequence: account takeover, data exfiltration, privilege escalation, RCE. The more concrete, the higher the bounty.
• Suggested FixOptional but valued recommendation: input validation, content-security-policy, prepared statements, credential scoping.

When a report is closed as resolved and the program marks it public, it moves to the disclosed reports section — and that's where the educational gold mine begins.

Here's the difference that defines BBLabs and the hunters who actually get paid: studying real reports is not the same as solving CTFs.

When you read 100 real IDOR reports, you stop thinking about "looking for IDOR" and start recognizing the code patterns that produce IDOR. That intuition is what separates those who find bugs from those who only read about them. That's why HackerOne's top hunters spend time each week reading disclosed reports in their category.

The full guide to learning bug bounty explains it in more detail, but the key point is: theory without practice on real bugs doesn't scale. And practice without having read real reports doesn't either.

These are the main sources of public reports every hunter should be following:

• HackerOne Hacktivity

  The largest feed of disclosed reports. Filter by program, severity and vuln type. Most Top 100 hunters' reports are published here.

• Bugcrowd CrowdStream

  Public reports from programs hosted on Bugcrowd. Lower volume than H1 but higher average quality on some enterprise targets.

• reddelexc/hackerone-reports

  A GitHub repo indexing thousands of disclosed reports by category (XSS/IDOR/SSRF/SQLi/RCE...). Useful for systematic study by type.

• Pentester Land — Writeups

  An aggregator of writeups on hunters' blogs. Many include the original report plus extra context on how the bug was found.

The recommended routine: 30 minutes a day reading 2-3 reports in your favorite category (don't read random reports — specialize). In 3 months, your intuition for that vuln will be radically different.

Reading a report is good. Replicating it is where you really learn. The problem is you almost never get to run the original bug (the target is already patched, the endpoint is gone, you don't have valid credentials).

BBLabs solves that with a simple 4-step pipeline:

Each category has labs based on different reports. Here are some examples of the kind of bugs you'll find:

• Cross-Site Scripting (XSS)

  Practice XSS

  Stored XSS on a public profile that runs JS when visited: $5,000-$15,000 on mid-size programs. The classic report includes the vulnerable endpoint, the exact payload and the impact statement (session takeover, ATO).

• Insecure Direct Object Reference (IDOR)

  Practice IDOR

  IDOR on a billing endpoint that lets you list other users' invoices by changing a sequential ID: $2,000-$10,000. The report details the endpoint, the manipulated parameters and the step-by-step PoC.

• Server-Side Request Forgery (SSRF)

  Practice SSRF

  SSRF that reaches the AWS metadata endpoint and exfiltrates temporary credentials: $10,000-$50,000. The classic report shows the chain all the way to `169.254.169.254/latest/meta-data/`.

• SQL Injection

  Practice SQLI

  Time-based blind SQLi on a search parameter that ends in RCE via `xp_cmdshell` (MSSQL): $20,000+. The report includes the injected query, the timings and the escalation.

• Authentication Bypass

  Practice AUTH-BYPASS

  JWT with `alg: none` accepted by the backend, letting you impersonate any user: $5,000-$25,000. The report shows the tampered token and the vulnerable endpoint.

• Business Logic Flaws

  Practice BUSINESS-LOGIC

  Race condition at checkout that lets you use the same coupon N times by sending requests in parallel: $1,000-$8,000. The report shows the PoC with `turbo intruder` or a `single packet attack`.

If you've been reading writeups on X and blogs for a while but have nowhere to replicate what you read, this is the next step. Every BBLabs lab is a real report turned into a safe, downloadable environment. €7.99/mo, no lock-in.