What is XSS?

XSS stands for cross-site scripting, which is a type of injection security attack in which a hacker injects a malicious script or other data into content from trusted websites. The hacker exploits a vulnerability in a trusted site and delivers the malicious code with dynamic content from the site to be executed by a victim’s browser. Traditionally, XSS has been known as a method for hackers to steal cookies, allowing them to impersonate the victim online and use their private accounts. These attacks affect users rather than applications.

How to Recognize This Threat: It can be difficult for a user to recognize when an XSS attack has occurred, but when users are affected, they will likely report the issue to the website where they encountered the issue. Web administrators may also detect issues through routine vulnerability assessments.

How to Prevent This Threat: In addition to regular vulnerability assessments, strong coding, and input & output sanitation are helpful. But a security solution should also be in place, like a web application firewall to protect your users’ information and your organization’s reputation.