DuckDuckGo Search & Tracker ProtectionSecurity Analysis

Extension has cookie access and sends data to external servers — potential session token theft.

Extension intercepts network traffic and sends data externally — potential man-in-the-middle behavior.

Extension has access to all sites and captures keyboard input — behavior consistent with a keylogger.

Dynamically creates script elements, potentially loading external malicious code.

Listens for keyboard events, a common technique used by keyloggers.

Uses eval() to execute dynamic code, a common technique for obfuscation and code injection.

Creates functions from strings, similar to eval(), often used to hide malicious code.

Uses eval() to execute dynamic code — a common vector for code injection.

Creates a function from a string (new Function()), similar to eval().

Object.defineProperty() called on window — can intercept and override built-in browser APIs.

XSS in jQuery.when with untrusted input

Content script runs at document_start in ALL frames on ALL URLs. This gives the extension deep access to every page load, including iframes.

Extension tracks open tabs and communicates with external servers — potential browsing surveillance.

Intercepts form submissions, could capture login credentials.

Modifies window.location to redirect the user, potentially to phishing or malicious pages.

Sends messages via Chrome runtime, could communicate with external services.

Decodes base64 data, commonly used to hide malicious payloads.

Makes HTTP requests to external servers, may be used for data exfiltration.

Dynamically creates iframe elements, which can be used to load external content or hide malicious UI.

JavaScript file could not be parsed. May contain obfuscated or minified code.

Fetches external URL: https://quack.duckduckgo.com/api/email/addresses

Line exceeds 5000 characters (entropy: 4.674696111816109)

XSS via HTML passed to DOM manipulation methods

Cross-site scripting via cross-domain ajax requests

Web-accessible resources use <all_urls> or wildcard patterns, exposing resources to every website.

Sets innerHTML directly, which can lead to XSS if used with untrusted data.

Encodes data to base64, may be used for data exfiltration.

Creates a Web Worker, which runs code in a separate thread — can be used for background computation or crypto mining.

String with entropy 5.65 bits — may be encoded/encrypted data

object-src is not set to 'none'. Plugins like Flash can be embedded, which may allow code execution.

public/js/base.js