Introduction to Web Penetration Testing

What is Web Application Penetration Testing? Full Guide 2025

All Phases of Penetration Testing (Stages and Process)

What is Penetration Testing Execution Standard (PTES)? Different Stages Explained

Information Gathering

Understanding Information Gathering in Web Application Penetration Testing

Network Scanning in Pentesting

Understanding Network Scanning in Web Application Penetration Testing

Vulnerability Assessment

Vulnerability Assessment in Website Penetration Testing

Attacks and Vulnerabilities

What is Parameter Tampering and Temptation Attack in Penetration Testing & Cybersecurity?

What is SQL Injection (SQLi) Attack in Website & Web Application? Explained

What is Cross-Site Scripting (XSS) Attack & Vulnerability? Meaning, Types, Methodology, Countermeasures

What Are Local File Inclusion (LFI) & Remote File Inclusion (RFI) Vulnerabilities? Difference Explained

What is Cross-Site Request Forgery (CSRF) Vulnerability? CSRF Attack Explained With Example

Host Header Injection

What is Cross-Origin Resource Sharing (CORS) Vulnerability in Web API?

What is Session Hijacking Attack in Cyber Security? Meaning & Definition

What is Denial of Service Attack? DoS Attack and Its Types

What is System Hacking in Ethical Hacking? Meaning & Definition

Bug Reporting

What is Bug Reporting in Testing? Bug Report Meaning

How to Write a Bug Report? Bug Scoring, Format, Template

Web Penetration Testing Using Python

Introduction to Python for Web Application Penetration Testing

Fundamentals of Python for Web App Penetration Testing

Pentesting Using Shell Scripting

Shell Scripting Tutorial: Full Guide to With Basics & Cool Scripts to Learn Shell Scripting

Advanced Concepts

Agile Penetration Testing: Use, Benefits, Lifecycle, Methodology

DAST vs Penetration Testing (All Differences & Comparison)

10 Best Penetration Testing Tools in 2025 (Pentesting Tools & Toolkit)

All Types of Penetration Testing (With Examples & Details 2025)

Continuous Penetration Testing: Benefits, Cost, Full Guide

Full Checklist for Web App Pentesting (2025 Cheat Sheet)

20 Best Web Application Penetration Testing Tools in 2025

Website Penetration Testing - Certificate

In an increasingly interconnected world, web applications have become a cornerstone of modern business operations. From e-commerce platforms to social networking sites, these dynamic and interactive interfaces allow users to access information, conduct transactions, and communicate seamlessly. However, the convenience and efficiency of web applications come hand in hand with potential vulnerabilities that can be exploited by malicious actors. This is where web app penetration testing comes into play.
Web application penetration testing is a systematic process of evaluating the security of web applications by simulating real-world attacks. The primary objective is to uncover vulnerabilities, weaknesses, and potential entry points that could be exploited by attackers to compromise the confidentiality, integrity, or availability of the application and its underlying data.
This comprehensive web application penetration testing tutorial aims to provide an in-depth exploration, equipping both aspiring security professionals with the knowledge and skills necessary to identify and mitigate vulnerabilities within web applications. Through a structured and methodical approach, this tutorial on web app pentesting will guide you through various stages, enabling you to assess the security posture of web applications effectively.

Website Penetration Testing - Example

Web App Penetration Testing Interview Questions

Welcome to the most comprehensive and practical Web Application Penetration Testing tutorial for beginners. Everything is explained in simple terms!

Web Application Penetration Testing Tutorial (Full Guide 2025)

Web App Penetration Testing Tutorial

Web App Penetration Testing Quiz

Acquire essential skills required to become a pro web penetration tester.

Web Application Penetration Testing Tutorial (Web App Pentesting Guide)

What is Cross Site Scripting (XSS) Attack?

Types of Cross Site Scripting (XSS) Attacks

Test your knowledge with a quick quiz!

XSS Methodology

XSS Attack Countermeasures

<a href="https://owasp.org/www-community/attacks/xss/" target="_blank" rel="noopener">Cross-site Scripting</a> is a kind of injection where hackers write and execute malicious scripts into websites. This can be done through browsers. The injections become successful when the vulnerabilities in the website or web app take the input without any validation and show the output.&nbsp;
Using XSS attacks, the hackers can send the malicious code to other end users of the source and gain access to cookies, session tokens, as well as other confidential details in the browser.

Three different types of cross-site scripting attacks are there:
<h3 role="presentation">1. Stored XSS</h3>
Also called Persistent or Type I attack, the Stored XSS is caused when the inputs by the users are stored on the server.&nbsp;
<h3 role="presentation">2. Reflected XSS</h3>
Reflected XSS, also known as Non-persistent or Type II, is caused when the web app or website shows the errors to user input instantly.&nbsp;
<h3 role="presentation">3. DOM-Based XSS</h3>
DOM-based XSS or Type 0 injections occur when the source of data, sink, as well as the data flow, all take place in the DOM.&nbsp;

What are two primary types of XSS vulnerabilities?

For launching an XSS attack, the hackers execute a malicious code into the input entered by the user. This can also be done by making changes to the request. In case the web app or site is found vulnerable to cross-site scripting attacks, the user input will be injected as a code.&nbsp;
There are multiple methods to trigger cross-site scripting attacks. For instance, it can be triggered when the page is loading or when the user is browsing and moving over the elements on a web page.&nbsp;
Once the attack is launched, the hackers can capture the keystrokes of the users, redirect them to a malicious site, run exploits based on browsers, access the cookie information of the users who are logged into the site, etc.&nbsp;
In the worst cases, the hackers can gain access to the accounts of the victims and steal credentials.

The level of effort required to prevent XSS attacks depends on the complexity of the app and the attack. However, the following are some countermeasures for the prevention of cross-site scripting attacks.&nbsp;
<ul>
<li>
When the site or app receives user input, it should be filtered and validated.
</li>
<li>
When the data controlled by users is output in HTTP responses, the output should be encoded.
</li>
<li>
Implement HTML, URL, JavaScript, and CSS encoding on the basis of the context of the output.&nbsp;
</li>
<li>
Use relevant response headers for prevention of such attacks in HTTP responses which are not supposed to include HTML or JS.
</li>
<li>
Have a content security policy in place to minimize the severity of cross-site scripting flaws.
</li>
</ul>

The exploit where the hacker enters malicious code into links that look like from a trusted source?

Learn what is cross-site scripting or XSS attack, its types, XSS methodology and countermeasures. Learn with practical videos and solve the quizzes.

What is Cross-Site Scripting (XSS) Attack? Meaning & Types