WebGoat is evaluated as a teaching platform for web application security and propose improvements of both a didactic and structural nature. We focus on SQL Injection, XSS$,$ Html Tampering, IDOR and Client$-$Side Filtering vulnerabilities since these are common in web applications and are difficult to detect. WebGoat is a deliberately insecure web application developed for educational purposes. It is aimed at the security specialists who wish to get a better understanding of the risks and vulnerabilities found in modern web applications and to learn how to avoid security breaches in their own web development. The application contains the most common types of security holes and it is in use by companies such as Google for educating their employees. Each lesson has a plan explaining the background of the problem and hints which guide the learners to a solution; the learners$$ task is to finish the lesson by exploiting the vulnerability. Due to web application security encompassing a wide area of technologies which often interact, it is a difficult process even for users with programming experience to complete the lessons given in WebGoat. The variety of technologies and standards make it a difficult subject to teach.Web application security in general is a challenging task since it encompasses many varying technologies $-$ from HTTP protocols to Java and PHP programming. An error in each of these could have a sever security impact. For an organization, vulnerabilities in web applications could be costly since any investments in firewalls and intrusion detection systems are bypassed by the nature of web applications. Web applications are by nature exposed to a wider audience.$$can you paraphrase this in your own Words?