Is ePadLink SigCaptureWeb SDK Extension safe?

Medium risk

ePadLink SigCaptureWeb SDK Extension relays arbitrary page-controlled data to a local native signature-pad application on every website.

The extension's content script runs on all websites and listens for a custom DOM event. When fired, it reads a page-supplied attribute verbatim and forwards it through the background script to the native messaging host com.epadlink.sigcapturewebsdk.win — a locally installed signature-capture application — without validating which site triggered the event. As a side effect, the content script also writes an attribute to the document root on every page it loads, allowing any website to detect that the extension is installed.

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

Topaz Systems Incv1.2.9.0Chrome Web Store
45Risk
Who publishes it

Topaz Systems, 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
Topaz Systems Inc
Declared legal entity
Topaz Systems, Inc.
Registered address
875 Patriot Dr Unit A, Moorpark, CA 93021-3351, US
Registered contact
Tony Zank

Same store account

2 other listings published from this account, 1.0M+ users between them, none of them carrying a finding.

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 1.2.9.0. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Talk to a program installed on your computer, outside the browser's sandbox

    nativeMessaging

Where it sends data

Destinations our analysis observed ePadLink SigCaptureWeb SDK 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.

  • com.epadlink.sigcapturewebsdk.win

    ePadLink SigCaptureWeb SDK sends data to com.epadlink.sigcapturewebsdk.win. No other extension we have analysed sends data here.

Updated 30 September 2026idldbjenlmipmpigmfamdlfifkkeaplc