Definition ∞ JavaScript Injection is a cyberattack where malicious JavaScript code is inserted into a website. This security vulnerability allows an attacker to insert arbitrary JavaScript code into a web page, which then executes within the context of a user’s browser session. The injected script can steal sensitive data, redirect users to malicious sites, or alter the page content. Such attacks exploit insufficient input validation and output encoding on web applications.
Context ∞ JavaScript injection poses a significant risk to web-based cryptocurrency platforms, including exchanges, wallets, and decentralized applications, often leading to asset theft or account compromise. News reports frequently detail incidents where user credentials or private keys were compromised through such client-side exploits. Developers must rigorously sanitize user inputs and implement strong content security policies to defend against these pervasive threats.
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