When to sanitize (remove <script> tags) text entered by a user? [closed]

1. When should you sanitize HTML?
2. How do you disinfect text in HTML?
3. What is sanitizing in Javascript?
4. What means sanitize HTML?

When should you sanitize HTML?

HTML sanitization is an OWASP-recommended strategy to prevent XSS vulnerabilities in web applications. HTML sanitization offers a security mechanism to remove unsafe (and potentially malicious) content from untrusted raw HTML strings before presenting them to the user.

How do you disinfect text in HTML?

Sanitize a string immediately

setHTML() is used to sanitize a string of HTML and insert it into the Element with an id of target . The script element is disallowed by the default sanitizer so the alert is removed.

What is sanitizing in Javascript?

The sanitize() method of the Sanitizer interface is used to sanitize a tree of DOM nodes, removing any unwanted elements or attributes. It should be used when the data to be sanitized is already available as DOM nodes. For example when sanitizing a Document instance in a frame.

What means sanitize HTML?

HTML sanitization is the process of examining an HTML document and producing a new HTML document that preserves only whatever tags are designated “safe” and desired. HTML sanitization can be used to protect against cross-site scripting (XSS) attacks by sanitizing any HTML code submitted by a user.