Burp Suite is the industry-standard web application security testing platform. It provides an integrated set of tools for performing security testing, from initial mapping to exploitation of vulnerabilities.
# Intercepting requests
1. Configure browser to use Burp as proxy (127.0.0.1:8080)
2. Browse target application
3. Intercept → view/modify → forward
# Fuzzing with Intruder
1. Send request to Intruder
2. Mark payload positions with §
3. Configure payload lists
4. Start attack, analyze responses
# Repeating and modifying
1. Send request to Repeater
2. Modify parameters
3. Send and compare responses
Burp supports extensions via the BApp Store and custom plugins written in Java, Python (Jython), or Ruby (JRuby).