hat is a vulnerability that allows criminals to inject scripts into web pages viewed by users?XML injectionbuffer overflowSQL injectionCross-site scripting

Sure, let's analyze each option step by step to determine which one is a vulnerability that allows criminals to inject scripts into web pages viewed by users.

1. XML Injection:

   • XML Injection is a type of attack where the attacker tries to inject malicious XML content into the application. This can lead to unauthorized access to data or even execution of arbitrary code, but it is not specifically about injecting scripts into web pages viewed by users.

2. Buffer Overflow:

   • Buffer Overflow is a type of vulnerability where an attacker can overwrite the memory of an application, potentially leading to arbitrary code execution. This is more about exploiting memory management issues rather than injecting scripts into web pages.

3. SQL Injection:

   • SQL Injection is a type of attack where the attacker can execute arbitrary SQL code on the database by injecting malicious SQL queries. This can lead to data breaches and unauthorized access to data, but it is not specifically about injecting scripts into web pages.

4. Cross-site Scripting (XSS):

   • Cross-site Scripting (XSS) is a type of vulnerability that allows attackers to inject malicious scripts into web pages viewed by users. These scripts can then execute in the context of the user's browser, potentially leading to data theft, session hijacking, and other malicious activities.

Based on the analysis, the correct answer is:

Cross-site scripting (XSS)