A company's Web development team has become aware of a certain type of security vulnerability in their Web software. To mitigate the possibility of this vulnerability being exploited, the team wants…

Cross-site scripting (XSS) occurs when a web application accepts unescaped or unsanitized HTML and JavaScript from user input and renders it in the browser of another user. Attackers exploit this by injecting script tags or event handlers that execute in the victim's browser session, potentially stealing cookies or credentials. Disallowing HTML input or encoding it before rendering is the primary mitigation for reflected and stored XSS attacks.

Session management vulnerabilities involve improper handling of session tokens, insecure cookies, or session fixation - not the acceptance of HTML markup as user input.

SQL injection involves inserting malicious SQL syntax into database queries through input fields, not injecting HTML markup into web page content.

Cross-site Request Forgery (CSRF) exploits an authenticated user's session to submit unauthorized requests to a trusted site, and is not related to accepting HTML as user input.