Playwright Testing for Authentication Flow Security Vulnerabilities

Test CSRF protection, XSS prevention, session fixation, clickjacking headers, and open redirect vulnerabilities in web application authentication. This guide provides step-by-step Playwright patterns to handle this scenario reliably.

Introduction

Robust automation requires handling domain-specific patterns effectively. This article covers playwright testing for authentication flow security vulnerabilities with production-ready Playwright code.

Architecture Overview

graph TD
    CSRF["CSRF Test"] --> Token["Remove CSRF Token"]
    Token --> Submit["Submit Form"]
    Submit --> Server["Server Validation"]
    Server --> Reject["403 Forbidden"]

Implementation Guide

test('CSRF token is required for form submission', async ({ page }) => {
  await page.goto('/settings/change-password');

  // Attempt to submit without CSRF token by removing it
  await page.evaluate(() => {
    document.querySelector('[name="_csrf"]')?.remove();
  });

  await page.getByLabel('New Password').fill('NewPass123!');
  await page.getByRole('button', { name: 'Change Password' }).click();

  // Should be rejected with 403
  await expect(page.getByText(/forbidden|invalid token/i)).toBeVisible();
});

Run Your Tests

npx playwright test --grep "Playwright Testing for"
npx playwright test --ui

Reference Table

Best Practices

Common Mistakes

Frequently Asked Questions

How to test for XSS vulnerabilities with Playwright?

Input script tags in form fields and verify the app sanitizes output rather than executing the script.

Can Playwright test clickjacking protection?

Check X-Frame-Options or CSP frame-ancestors headers in the response using page.route() request interception.

How to test open redirect vulnerabilities?

Set redirect URLs with external domains and verify the app blocks or sanitizes the redirect target.

How to test session fixation?

Get a pre-auth session token, log in, and verify the session ID changes after successful authentication.

How to test password strength enforcement?

Try common weak passwords and verify the form rejects them with appropriate strength requirements.

Summary

Test CSRF protection, XSS prevention, session fixation, clickjacking headers, and open redirect vulnerabilities in web application authentication. Apply these patterns to build a reliable, maintainable automation suite for your specific use case.

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