Which of the following is considered an active type of attack?

Cross-site scripting (XSS) is considered an active type of attack because it involves an attacker injecting malicious scripts into websites or applications that are then executed by unsuspecting users' browsers. This type of attack enables the attacker to manipulate user sessions, steal data, or execute actions on behalf of the user without their consent. The active nature of this attack lies in its direct interaction with the execution environment, affecting real-time data and user interactions.

In contrast, a passive attack, which involves eavesdropping on or intercepting data without actively altering it, does not constitute an active engagement in the system. An inside attack refers to threats that originate from within the organization but may not necessarily involve direct manipulation or interference with system operations like XSS does. Lastly, a natural disaster is an event that impacts facilities and operations physically; it does not involve malicious intent or actions aimed at exploiting technology or information systems.