Exam PT0-002 topic 1 question 369 discussion

A company developed a new web application to allow its customers to submit loan applications. A penetration tester is reviewing the application and discovers that the application was developed in ASP and used MSSQL for its back-end database. Using the application's search form, the penetration tester inputs the following code in the search input field:

IMG SRC=vbscript:msgbox("Vulnerable_to_Attack");>originalAttribute="SRC"originalPath="vbscript;msgbox ("Vulnerable_to_Attack ");>"

When the tester checks the submit button on the search form, the web browser returns a pop-up windows that displays "Vulnerable_to_Attack." Which of the following vulnerabilities did the tester discover in the web application?