This report contains 287 browser extensions tracking 37 million+ users. These were identified using methodology of sandboxing extensions, automatically browsing to URLs, and measuring a data ratio transferred. Real companies, fake services, well established, it's a mixed bag. For many of these extensions, it isn't just an incidental leak that might be tracking your browsing session. They add methods to encrypt payloads before sending to their callback services.

Cursor is now using Open VSX to install code editor extensions from. You must understand the implications of this right now.

There has been an attack campaign happening for more than a month with extensions that install ScreenConnect. Below is ANOTHER example.

https://twitter.com/0xzak/status/1955265807807545763

For example, we have "ethereum.solidity-ethereum". The most trusted solidity extension on the VS Marketplace is "JuanBlanco.solidity". If you didn't know, would you trust a person's name or something related to ethereum? Hard to tell!

🚨 ICYMI - 245 browser extensions contained a code library called Mellowtel which allows anyone to make requests through your browser while extension owners get paid. This has impacted over 900,000 users! Let's take a look at how it works! 👇 The library is easily added to any extension which already has 'declarativeNetRequest', 'storage' and '<all_urls>' permissions defined. These are quite common but also provide quite a bit of access to the browser. A background script and content script are also included.