← Back to all products

OWASP Security Checklist

$29

Complete OWASP Top 10 implementation guide with code examples, testing scripts, and remediation patterns.

📁 32 files
MarkdownJavaScriptPythonCI/CD

📄 Product Preview

Try the interactive reader and demo tools below, or get the full product with all content unlocked.

📖 Interactive Reader (Free Preview) ⚙ Try Demo Tools 📦 Download Free Sample

📁 File Structure 32 files

owasp-security-checklist/ ├── LICENSE ├── README.md ├── docs/ │ ├── A01-broken-access-control.md │ ├── A02-cryptographic-failures.md │ ├── A03-injection.md │ ├── A04-insecure-design.md │ ├── A05-security-misconfiguration.md │ ├── A06-vulnerable-and-outdated-components.md │ ├── A07-identification-and-authentication-failures.md │ ├── A08-software-and-data-integrity-failures.md │ ├── A09-security-logging-and-monitoring-failures.md │ ├── A10-server-side-request-forgery.md │ ├── remediation-checklist.md │ └── secure-coding-quick-reference.md ├── examples/ │ ├── access-control/ │ │ ├── fixed.py │ │ └── vulnerable.py │ ├── crypto/ │ │ ├── fixed.py │ │ └── vulnerable.py │ ├── injection/ │ │ ├── fixed.js │ │ ├── fixed.py │ │ ├── vulnerable.js │ │ └── vulnerable.py │ └── ssrf/ │ ├── fixed.py │ └── vulnerable.py ├── free-sample.zip ├── guide/ │ ├── 01-introduction-to-owasp-top-10.md │ ├── 02-access-control-and-crypto-failures.md │ ├── 03-injection-insecure-design-misconfiguration.md │ ├── 04-vulnerable-components-auth-integrity.md │ └── 05-logging-monitoring-ssrf.md ├── index.html └── tests/ └── test_examples.py

📖 Documentation Preview README excerpt

OWASP Top 10 (2021) — Implementation & Testing Guide

A complete, hands-on reference for the OWASP Top 10:2021. Every category gets

a plain-English explanation, paired vulnerable-vs-fixed code in multiple

languages, concrete test procedures, a remediation checklist, and links

to authoritative secure-coding references. Ten of the example pairs are runnable,

and a test suite proves the fixes actually hold.

Built for engineers who have to ship secure code and prove it — not just read

about it. No tool licenses, no cloud account, no dependencies beyond Python's

standard library and Node's built-ins.

Table of Contents

1. [Who this is for](#who-this-is-for)

2. [What's included](#whats-included)

3. [How to use it](#how-to-use-it)

4. [Run the examples and tests](#run-the-examples-and-tests)

5. [The OWASP Top 10:2021 at a glance](#the-owasp-top-102021-at-a-glance)

6. [File-by-file guide](#file-by-file-guide)

7. [FAQ](#faq)

8. [License](#license)

9. [Support](#support)

Who this is for

  • Backend / full-stack engineers who want a practical checklist and copyable

fixes, not a 200-page standard.

  • Tech leads running secure code review and threat modeling.
  • Security engineers / AppSec onboarding teams to the Top 10 with real examples.
  • Candidates preparing for security-focused interviews who want crisp,

example-backed explanations.

Assumes working knowledge of HTTP, SQL, and either Python or JavaScript. No prior

security specialization required.

What's included

ContentFilesDetails
Per-category guides10One deep-dive per Top 10 category (A01–A10)
Secure-coding quick reference1Use/avoid tables for crypto, injection, headers, more
Remediation checklist1Copy-into-tracker checklist + threat-model + release gate
Vulnerable/fixed examples10Runnable pairs: injection, access control, SSRF, crypto (Python + JS)
Verification test suite1Proves the fixes resist the attacks (unittest, stdlib only)

Each category guide follows the same structure: **what it is → why it matters →

vulnerable vs. fixed code → how to test (manual + automated) → remediation

checklist → secure-coding references** with CWE mappings.

How to use it

... continues with setup instructions, usage examples, and more.

📄 Code Sample .py preview

examples/access-control/fixed.py#!/usr/bin/env python3 """A01 Broken Access Control — FIXED example. The same invoices service, hardened: * Every lookup is scoped to the authenticated owner (no IDOR). * A wrong owner gets `None` (caller maps to 404), so we don't confirm the row exists to an attacker. * Profile updates are restricted to an allow-list of editable fields, so a user cannot set `role` (no mass assignment / privilege escalation). python3 fixed.py See `../../docs/A01-broken-access-control.md` for the full write-up. """ from __future__ import annotations USERS = { 1: {"id": 1, "name": "Alice", "role": "user"}, 2: {"id": 2, "name": "Bob", "role": "user"}, } INVOICES = { 1001: {"id": 1001, "owner_id": 1, "amount": 4200, "memo": "Alice's invoice"}, 1002: {"id": 1002, "owner_id": 2, "amount": 9100, "memo": "Bob's invoice"}, } # Fields a user is allowed to change about themselves. Anything else is ignored. EDITABLE_PROFILE_FIELDS = {"name", "bio", "avatar_url"} def get_invoice_secure(current_user_id: int, invoice_id: int) -> dict | None: """Return an invoice only if it belongs to the caller. The ownership predicate is part of the lookup, so guessing an ID that belongs to another user yields None (the caller should respond 404). """ invoice = INVOICES.get(invoice_id) if invoice is None or invoice["owner_id"] != current_user_id: return None return invoice
Buy Now — $29 Back to Products