Introduction To Cross-Side Scripting (XSS)
Cross-site scripting (XSS) attacks are a type of web application security vulnerability that allow attackers to inject malicious code into web pages viewed by other users. XSS attacks occur when a web application fails to properly validate user input or output, allowing attackers to inject malicious code into the application's HTML or JavaScript code.
There are two main types of XSS attacks:
Reflected XSS: This type of attack involves the attacker injecting malicious code into a web page that is then reflected back to the user, often through a search box or other user input field. The user's browser then executes the malicious code, which can steal the user's sensitive information or perform other malicious actions.
Stored XSS: This type of attack involves the attacker injecting malicious code into a web application's database, which is then served to all users who view the affected web page. This can be especially dangerous if the web application stores sensitive user information, as the attacker can potentially steal this information from all users who view the affected web page.
To prevent XSS attacks, web developers should properly sanitize and validate all user input and output, and use security mechanisms like Content Security Policy (CSP) to restrict the sources of executable code on a web page. Users can also protect themselves from XSS attacks by keeping their web browsers and plugins up to date, using browser extensions that block malicious scripts, and being cautious when clicking on links or entering sensitive information into web forms.
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