How to Hack Web Applications — SQL Injection, XSS, Auth Bypass Tutorial | Vaarta

What is Web Application Hacking?

Web application hacking is the process of finding and exploiting vulnerabilities in web applications. Understanding how attackers think is the first step to building secure systems.

Why Learn Web Hacking?

Common Web Vulnerabilities

1. SQL Injection (SQLi)

**What it is**: Inserting malicious SQL code into database queries

**How it works**:

Input: admin' OR '1'='1' --

Query: SELECT * FROM users WHERE username='admin' OR '1'='1' --' AND password='anything'

Result: Authentication bypass, all users returned

**Prevention**:

2. Cross-Site Scripting (XSS)

**What it is**: Injecting malicious scripts into web pages viewed by other users

**Types**:

**Prevention**:

3. Authentication Bypass

**What it is**: Accessing protected resources without proper credentials

**Common methods**:

**Prevention**:

4. Broken Access Control

**What it is**: Users accessing resources they shouldn't

**Examples**:

**Prevention**:

5. Server-Side Request Forgery (SSRF)

**What it is**: Tricking the server into making requests to internal resources

**Impact**:

**Prevention**:

Step-by-Step Hacking Methodology

Phase 1: Reconnaissance

1. Gather information about the target

2. Identify technologies used

3. Find subdomains and services

4. Map the application structure

Phase 2: Scanning

1. Run vulnerability scanners

2. Test for common vulnerabilities

3. Identify potential entry points

4. Analyze security headers

Phase 3: Exploitation

1. Attempt to exploit found vulnerabilities

2. Gain initial access

3. Escalate privileges if needed

4. Maintain access

Phase 4: Reporting

1. Document all findings

2. Provide proof of concept

3. Recommend remediation steps

4. Create executive summary

Tools for Web Hacking

Burp Suite

Industry standard for web application testing

OWASP ZAP

Free, open-source web application scanner

SQLMap

Automates SQL injection detection

Nikto

Web server vulnerability scanner

Nmap

Network discovery and port scanning

Legal Considerations

**IMPORTANT**: Only test systems you own or have written authorization to test. Unauthorized testing is illegal under the IT Act 2000 and can result in criminal charges.

How Vaarta.space Helps

Our scanner identifies common web vulnerabilities including:

Conclusion

Web hacking is a valuable skill for both attackers and defenders. Learn the techniques to protect your systems.