There are different types of attacking methods that hackers use in order to endanger the security of different users' systems, users are also trying to resist hacking attacks by taking various steps in order to prevent hackers from achieving their goal, one of the most important and also dangerous attacks is called cross site scripting , which is a popular attack among hackers, and they often prefer to use it in order to gain access to different users’ information, in this article, we are going to take a look at the best defense against cross site scripting attacks.                                                                                                                           

What are cross site scripting attacks?

In this attack, which is also called XSS , hackers achieve their goal by using malicious codes and scripts, and cause many users to fall into the trap of hackers by entering these codes in different websites, these types of attacks , which can do a lot of damage to many users’ systems, are more common in JavaScript.There are many reasons that make this attack dangerous, among which we can point to the possibility that users who are exposed to such attacks may realize the infiltration long after their information has been made available to hackers, so they let their information be stolen easily, and continue to operate naturally.As we mentioned above, in these attacks, hackers place malicious code on different sites, various links, etc., which cause a site that seems to be credible to do a lot of harm to different users’ systems, and obviously, if users lose their information, they also lose trust in that site, so it is necessary for website owners to protect their users against such attacks , and do not allow hackers to achieve their malicious goals easily.Therefore, hackers can implement lots of malicious acts through this hacking method, which we can mention having access to various information and abuse it in order to achieve their desires, they can also have control over users’ systems, so that they can do whatever they want, they also inject trojan to the website, and try to destroy the system, etc., all of which are provided to the hackers through XSS attacks .                                                                                                          

Types of XSS attacks:

These attacks are divided into three main types, which are as follows.

- Reflected XSS:

It occurs when a program receives data in an HTTP request which contains that data in an instant response through an insecure way, through this attack, the hackers can perform any operation they want, which happens when the user visits the URL created by the hacker, and finally the hackers can achieve their goal.

- Stored XSS:

This type of attack may also be called persistent or second-order XSS, it occurs when a program receives the needed information from an unreliable source and causes the hacker to reach its target.

- DOM-based XSS:

These types of attacks are very dangerous because they may not be detected by firewalls, in fact, firewalls are considered as effective defense lines that various users get help from them in order to protect their information against hackers , so the important point is that this type of attack is able to bypass firewalls. 

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