CSP Bypass: Exploiting Content Security Policy Vulnerabilities in OWASP Juice Shop

Content Security Policy (CSP) is a critical defense mechanism that restricts the types of content a web page can load and execute, helping prevent malicious activities like XSS attacks. It works by defining strict rules for resources such as scripts, styles, and images, blocking anything that falls outside the policy. However, misconfigured or dynamically manipulated CSP headers can turn this safeguard into an exploitable weakness.

This lab demonstrates how poor validation and naive CSP configurations can expose applications to XSS vulnerabilities, emphasizing the need for proper header management and validation.

Objectives

Upon completing this lab, you will:

• Understand how CSP mitigates XSS attacks.
• Learn to identify and exploit weaknesses in CSP configurations.
• Bypass CSP to execute malicious JavaScript code.

Who is this lab for?

This lab is designed for:

• Developers who want to secure CSP configurations against bypass techniques.
• Security professionals seeking to enhance their skills in XSS exploitation.
• Learners exploring advanced web security concepts.