What is XSS
Attackers inject malicious scripts into web pages, which execute when accessed by other users. You can steal cookies, hijack sessions, and tamper with pages.
three types
Reflective: The script is in the URL and the server reflects it to the user. Storage type: The script is stored in the database and is loaded every time it is accessed. DOM type: Improper handling of pure front-end JS.
Defense methods
Output escape; CSP Content Security Policy; HttpOnly Cookie； Input filtering.
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