Is GrabzIt Web Monitor safe?
GrabzIt Web Monitor accepts any page's postMessage with no origin check, letting it arm the monitor setup with an attacker-chosen API key.
The extension's injected content script listens for window postMessage events without checking the sender's origin, so any script running on the same page can send a message that supplies its own applicationKey and opens the monitor-setup panel. If the user then completes the setup wizard, the monitor is created on GrabzIt's servers under that attacker-supplied key rather than the user's own account key. Separately, whenever an error is logged the extension also sends the user's real GrabzIt account key to its analytics vendor, PostHog, as the tracking identifier for that event.
Part of this rating comes from analysis signals we haven't published as detailed findings yet.
Who publishes itGrabzIt Limited - 8 other listings from the same operator, none carrying a finding
GrabzIt Limited - 8 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.
Same store account
8 other listings published from this account, 8k+ 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.
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 1.1.1. 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 grabz.it
*://grabz.it/*
Read and change your data on every site you visit
<all_urls>
See the address and title of every tab you have open
tabs
Run its own code inside the pages you visit
scripting
Store data in your browser
storage
Where it sends data
Destinations our analysis observed GrabzIt Web Monitor 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.
- api.grabz.it
GrabzIt Web Monitor sends data to api.grabz.it. 5 other extensions we have analyzed send data here.
- eu.i.posthog.com (PostHog)
GrabzIt Web Monitor sends data to eu.i.posthog.com (PostHog). Named as a recipient in this extension's own analysis.