Is SEOSpace - The SEO Plugin for Squarespace safe?

Medium risk

SEOSpace runs a content script on every site that relays page messages to its background worker, which can set the SEOSpace session cookie.

The extension injects a content script into every page you visit and relays window.postMessage and BroadcastChannel('seo-space') messages to its background service worker without checking which site or origin sent them. One relayed command, set_mirror_auth, writes a caller-supplied token into the SEOSpaceUserLogging session cookie on app.seospace.co, and other commands open caller-supplied URLs in new tabs. Because any web page can post these messages, an attacker page can set the value of your SEOSpace login cookie.

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

SEOSpacev2.5.6Chrome Web Store
40Risk
Who publishes it

Airwayz Capital SEO, LLC - no other listings under this identity, 1 shared hostname

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

Publisher
SEOSpace
Declared legal entity
Airwayz Capital SEO, LLC
Registered address
6671 W Indiantown Rd Suite 50-329, Jupiter, FL 33458-3991, US
Registered contact
David Wenger

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.

support.squarespace.com
Also called by 1 other listing: SquarespaceWebsites Tools PRO

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

Publishers can request a review.

Where it sends data

Destinations our analysis observed SEOSpace - The SEO Plugin for Squarespace 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.

  • app.seospace.co

    SEOSpace - The SEO Plugin for Squarespace sends data to app.seospace.co. No other extension we have analyzed sends data here.

Updated 2 November 2026jdpdpdkkofoclmgbopofhlmoikpfamao