We will talk here about the Cross-site scripting kinds of attacks, or if you prefer-XSS attacks. If you are long enough into a tech’s world, there is no way that you haven’t heard about XSS before. But if you haven’t, don’t worry, I will guide you through this tutorial which will help you to learn everything you need to know about it.
Cross-site Scripting Description
This is a kind of the issue which refers to the client-side code. Here, the attacker has a purpose to execute some very malicious scripts, which are mostly connected to those that belong to payments. So, this injection is executed in some legitimate browser. Have you known that XSS is the highest web app vulnerability? It mostly occurs once a web app is using some of the unvalidated user input. Of course, the usage applies to the output it actually generates. It is the truth that the attacker here doesn’t attack the victim directly, he or she doesn’t even target the victims. What do they do instead of it? You will hear in the next part of this lesson!
Cross-site Scripting Impact
Example Of Cross-site Scripting
This is how looks like an XSS vulnerable website:
print ”<h1>Most recent comment</h1>”
Do you see something malicious here? What is a threat is that the <script>doSomethingEvil();</script> code stays hidden, but once you open it will appear.
<h1>Most recent comment</h1>
Most of the times user won’t be able to recognize and to stop this attacks. But we will talk about that later, you know that we have a solution for literally everything!
Attacks Of Cross-site Scripting
When talking about this highly-dangerous injection, you need to know that it has various types. I will explain you all of those now. The first one is called reflected, which means that it is non-persistent. This is the basic web vulnerability. It is also far more common. The example would be that the existing vulnerabilities in Google may allow the malicious sites to attack the Google’s users, those that visited them while being logged in. The second type is called persistent or stored. Most of the times this type is coupled with a computer worm. They together allow the execution of the arbitrary code and listing on the filesystem. The next type is called DOM-based XSS flaw. Here the arbitrary HTML with scripts together could be simply injected and all that just by using some types of the force error messages. Self-XSS, our next type of the enemy. This one relies on the social engineering tips about whom I already talked about. The last type is called mXSS, or a mutated form. This is a form which almost cannot be seen once it has been performed, and about whom I’ve also already talked about.
How To Fix Cross-site Scripting
Afraid of XSS? You should be. But, not if you try to learn this lesson and to implement it in your cyber life