To answer this question, you need to understand the concept of different types of vulnerabilities.
Option A) Cross-site Scripting (XSS) - This option is incorrect because XSS refers to a vulnerability where an attacker can inject malicious scripts into a website or application, which then gets executed by the victim's browser.
Option B) Insecure Direct Object Reference (IDOR) - This option is correct. IDOR occurs when a developer exposes a reference to an internal implementation object, such as a file, directory, database record, or key, as a URL or form parameter. This allows an attacker to manipulate the exposed reference and access unauthorized resources or data.
Option C) Injection Flaw - This option is incorrect. Injection flaws refer to vulnerabilities where an attacker can inject malicious code or commands into an application and have them executed by the application's interpreter or database.
Option D) Cross-Site Request Forgery (CSRF) - This option is incorrect. CSRF refers to a vulnerability where an attacker tricks a victim into performing unwanted actions in a web application in which the victim is authenticated.
The correct answer is B) Insecure Direct Object Reference (IDOR). This option is correct because it accurately describes the vulnerability that occurs when a developer exposes a reference to an internal implementation object, such as a file, directory, database record, or key, as a URL or form parameter.