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Medium1 modules

Web Application Security

Where most bug bounties are won.

The OWASP Top 10 and beyond - SQLi, XSS, SSRF, IDOR, auth flaws and more. Hands-on with Burp Suite against deliberately vulnerable apps, each mapped to a real disclosed report.

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Web Application Security

Where most bug bounties are won. The OWASP Top 10 and beyond - hands-on with Burp Suite against deliberately vulnerable apps, mapped to real disclosed reports.

1

The OWASP Top 10

The map of web vulnerabilities - what each category means and how this module attacks them all.

2

HTTP & Burp Suite

Requests, responses, headers, cookies - and intercepting/modifying them with Burp Suite, your primary weapon.

3

Recon & Content Discovery

Map the attack surface: subdomains, directories, parameters, and hidden endpoints with ffuf, gobuster, and more.

4

SQL Injection

From a single quote to full database dump - error-based, union, and blind SQLi, plus sqlmap and prevention.

5

Cross-Site Scripting (XSS)

Reflected, stored, and DOM XSS - stealing sessions, building payloads, and why output encoding matters.

6

Cross-Site Request Forgery

Forcing authenticated actions, SameSite cookies, and how CSRF tokens defend (and fail).

7

Server-Side Request Forgery

Make the server fetch what you want - cloud metadata theft, internal port scanning, and SSRF filter bypasses.

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IDOR & Broken Access Control

The #1 OWASP category - horizontal and vertical privilege escalation by tampering with object references.

9

Authentication & Session Attacks

Credential stuffing, weak resets, JWT flaws, session fixation, and OAuth pitfalls.

10

File Upload Vulnerabilities

Bypassing upload filters to plant a web shell - and how content-type, extension, and magic-byte checks fail.

11

OS Command Injection

When user input reaches a shell - detecting, exploiting, and chaining command injection to full RCE.

12

XML External Entities (XXE)

Abusing XML parsers to read local files, perform SSRF, and exfiltrate data out-of-band.