Is Evernote Web Clipper safe?

Low risk

Evernote Web Clipper embeds a hardcoded HMAC secret in its bundle and accepts UI-trigger messages from any web origin.

The extension's content script listens for postMessage events on every page without validating the sender's origin, allowing any website script to open the clipper UI. The extension also hardcodes an HMAC secret key used to sign requests to its analytics endpoint, meaning anyone who inspects the bundle can forge signed analytics events. Both issues affect the extension running in its normal, installed state.

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

Evernotev7.42.0Firefox Add-ons
20Risk
Who publishes it

Evernote - no other listings under this identity

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

Publisher
Evernote

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 7.42.0. 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>

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

    activeTab

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

    tabs

  • Read and change cookies, including the ones that keep you signed in

    cookies

  • Add items to the right-click menu

    contextMenus

  • Show you desktop notifications

    notifications

  • Write to your clipboard

    clipboardWrite

  • Read whatever you have copied to your clipboard

    clipboardRead

Where it sends data

Destinations our analysis observed Evernote Web Clipper 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.

  • cec.svc.evernote.com

    Evernote Web Clipper sends data to cec.svc.evernote.com. No other extension we have analyzed sends data here.

Updated 2 November 2026amo-8381