Cyberhaven security extension V3Security Analysis

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

Extension manages other extensions and executes dynamic code — behavior consistent with malware dropper.

Dynamically creates script elements, potentially loading external malicious code.

Dynamically sets a script's src attribute to load external code at runtime.

Reads clipboard contents via the Clipboard API — can access copied passwords, crypto addresses, or sensitive data.

Injects and executes scripts in web pages programmatically.

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().

JavaScript files are accessible to ALL websites. Any page can load and interact with these scripts, enabling web→extension attacks.

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

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

Uses XMLHttpRequest to make network calls.

Fetches external URL: https://www.reddit.com/settings/account

Line exceeds 5000 characters (entropy: 5.206220794180441)

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

Extension uses tab tracking APIs (onUpdated/query) and communicates with external servers — potential browsing surveillance.

Reads or writes to localStorage, which may contain sensitive site data.

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

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

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