Understand what a cross-site scripting attack is, what an attacker can do by exploiting this vulnerability, and what tools are available to detect its presence or exploitation.
What is an XSS or Cross-Site Scripting attack?
In this post, we will talk about Cross Site Scripting, also known as XSS, one of the most common vulnerabilities since 2014. In fact, according to OWASP, this vulnerability,
Which will be includ in the injections category
from this year onwards, is one of image resize the top 10 most frequent vulnerabilities in web applications in 2021.
It is a type of attack that exploits security flaws in websites and allows attackers to implant malicious scripts on a legitimate website (also the attacker’s victim) to execute a script in the browser of an unsuspecting user who visits that website and affect it, either by stealing crentials, rirecting the user to another malicious website or performing a defacement on it.
OWASP currently explains that there are three most common forms of XSS attacks that target users’ browsers. Therefore, in this article, we review the attack vectors us by attackers to exploit this vulnerability, which can carry out an attack using Cross Site Scripting, and we also share a resource that you probably didn’t know about to identify the vulnerability or its exploitation. To give you an idea of the impact and interest that attackers have in this vulnerability, in the last year, there have been more than 100,000 reports of Cross Site Scripting attacks according to Vulners.
What is Cross-Site Scripting
As we mention above, XSS is a type of attack in which malicious agents are able to inject a malicious script into a website, which is then process and വർഷം മുമ്പ്, രണ്ട് ഭൗതികശാസ്ത്ര execut. This process, which is usually bas on the trust that the website has regarding data input, consists of sending the URL with the pre-load payload to the victim user with a specific objective: stealing the user’s personal data, session cookies, implementing social engineering techniques, among others.
There are three types of XSS that allow this agb directory attack to occur. Below, we review what they are and the measures we should take to protect ourselves: