There are several types of attack you can do on a websites...
1.Structured Query Language (SQL) Injection :
SQL injection is a common technique that involves injecting a malicious code to alter the sensitive information in the website’s back-end database. It may also be performed to steal payment card details, username and password as well as insert spam links to the website. SQL attacks are quite easy to execute and can severely compromise the data security of a company.
2.Cross-Site Scripting (XSS) :
Cross-site scripting (XSS) can be defined as a client-side code injection attack in which the hacker injects a malicious script, predominantly JavaScript, in a legitimate website. As these scripts appear to be from a trusted source, they are often executed by the end users. This, in turn, allows the hacker to gain access to the cookies, session tokens, passwords and other sensitive information.
3.Drive-By Downloads :
In this type of attack, the hackers tamper a web application with an HTML code that stealthily downloads a malware whenever a user visits the website. Once downloaded, the program may execute itself to record keystrokes, access important files, hijack online banking sessions or use the computer as a part of botnet.
4.DoS And DDoS :
Denial of service (DoS) and distributed denial of service (DDoS) attacks are carried out by flooding a website with traffic from multiple sources, making it unavailable for the genuine users. In a DoS attack, a single computer system may attempt to crash the target server with data packets. A DDoS attack is when multiple computers, widely distributed in a botnet, send simultaneous requests to slow down and ultimately halt the web server.
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