Is FuseBase PRO: AI Note taker, Meeting recorder and file sharing safe?

Low risk

FuseBase PRO lets any webpage replace the Nimbus session header used for later cloud uploads.

A webpage can send a broad postMessage that stores a new Nimbus session ID in the extension without origin checks. Later screenshot or file uploads to Nimbus attach that stored ID as EverHelper-Session-ID, alongside page data such as URL, title, and DOM content.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

Nimbus Web Incv3.7.9Chrome Web Store
19Risk
Who publishes it

NIMBUS WEB, INC. - 2 other listings from the same operator, none carrying a finding

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
Nimbus Web Inc
Declared legal entity
NIMBUS WEB, INC.
Registered address
6815 Euclid Ave, Cleveland, OH 44103, US
Registered contact
Pavel Shcherbakov

Same store account

2 other listings published from this account, 14k+ users between them, none of them carrying a finding.

Shared hosts - 1 hostname

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

nimb.ws
Also called by 5 other listings, including ClassroomGo - AI無邊際 (老師), Nimbus Screen Capture: Screenshot, Edit, Annotate

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 3.7.9. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on every site you visit

    <all_urls>

  • Run its own code inside the pages you visit

    scripting

  • Start, monitor and manage your downloads

    downloads

  • See the address and title of every tab you have open

    tabs

  • Act on the current tab, but only after you click the extension

    activeTab

  • Store data in your browser

    storage

  • Store an unlimited amount of data in your browser

    unlimitedStorage

  • Add items to the right-click menu

    contextMenus

  • Capture the contents of your screen, window or a tab

    desktopCapture

  • Capture the video and audio of a tab

    tabCapture

  • Write to your clipboard

    clipboardWrite

  • Read information about your displays

    system.display

  • Run hidden pages in the background

    offscreen

Where it sends data

Destinations our analysis observed FuseBase PRO: AI Note taker, Meeting recorder and file sharing contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • sync.nimbusweb.me

    FuseBase PRO: AI Note taker, Meeting recorder and file sharing sends data to sync.nimbusweb.me. One other extension we have analysed sends data here.

Updated 30 September 2026pljdghaomjmmleolekcgcamfpbhekbmc