XSS, or Cross-Site Scripting, allows attackers to inject malicious scripts into web pages viewed by users, leading to unauthorized actions, data theft, and session hijacking.
Stored XSS attacks occur when malicious scripts are stored on a server and served to users, while Reflected XSS relies on immediate script execution from a URL.
Preventing XSS in Spring Boot involves validating user input to confirm it matches expected formats and encoding output to ensure rendered data is treated as text.
The impact of XSS includes severe data theft and session hijacking, where attackers can impersonate users and perform unauthorized actions.
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