What Are Cross-Site Scripting (XSS) Attacks?

Cybercriminals frequently use cross-site scripting (XSS) attacks, so businesses need to learn how to fight them. We will look at different XSS attacks and how to combat them in this article.

Cross-site scripting is a common security vulnerability in websites (XSS). Malicious attackers have the ability to inject their own code into the user’s visible web page. This code can potentially be used for data theft, phishing, or malware distribution.

The three most common types of XSS attacks are Reflected XSS, Stored XSS, and DOM-based XSS.

Reflected XSS

Reflected XSS cyber attacks occur when malicious code is mirrored from a web server and then sent back to the victim’s browser. Cyber criminals will likely first email their victim a link to a malicious website. When the victim clicks the link, their browser will run the malware which then allows the attacker to take over their browser and, potentially, their machine.

How To Prevent Reflected XSS Attacks

To achieve their goals, attackers frequently use phishing emails or spoofed login pages in an effort to trick their targets into allowing them to execute reflected XSS assaults. In order to protect their websites from reflected XSS attacks, companies should use measures like input validation and output encoding to scrub user input before it is shown to visitors [view source].

Stored XSS

Because the malicious code is saved on the web server and executed on each visit to the affected page, stored XSS attacks are significantly more destructive than reflected XSS attacks. This gives the attacker a way in to either steal information from users or take over their accounts.

How To Prevent Stored XSS Attacks

Sites that allow users to post and edit content, such online forums and social media, are common targets of stored XSS attacks. A content security policy (CSP) can restrict the kinds of code that can be run on a website, protecting it from stored XSS assaults [view source].

DOM-based XSS

A DOM-based XSS attack is when malicious code is added and then executed in a victim’s browser’s Document Object Model (DOM). The attacker can then subtly alter the content of the page without the user even noticing. Due to their unnoticed complexity, DOM-based XSS attacks are harder to detect and prevent.

How To Prevent DOM-based XSS Attacks

Organizations can protect themselves from DOM-based XSS attacks by using client-side security mechanisms like Content Security Policy (CSP), JavaScript sandboxing, and input validation [view source]. Most XSS attacks are avoidable with proper sanitization of user input and validation of URLs and other data.

Attacks using cross-site scripting (XSS) are a common type of cyberattack that can inflict severe harm not only on corporations but also on individuals. Businesses are able to defend themselves and their customers from the various forms that XSS attacks can take by first gaining an awareness of the various sorts of XSS assaults and then adopting the necessary security measures. The potential for XSS attacks can be reduced by implementing client-side security mechanisms such as CSP and JavaScript sandboxing, as well as by validating and encoding inputs and outputs correctly. It is also essential to perform routine security audits and keep software up to date in order to keep a website secure.

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