Is CapMonster Cloud — automated captcha solver safe?
CapMonster Cloud reads all cookies for the current site and attaches them to the captcha-solving request it sends to its own API.
When CapMonster's background service builds a captcha-solving task for a page, it calls chrome.cookies.getAll() for that page's URL and appends every cookie name and value to the task before sending it to api.capmonster.cloud/createTask. The extension's page-injected captcha interceptors (for reCAPTCHA, hCaptcha, Turnstile, GeeTest, and Binance's captcha flow) also listen for window postMessage events without checking the sender's origin, so another script running on the same page can trigger a captcha solve.
Part of this rating comes from analysis signals we haven't published as detailed findings yet.
Who publishes itZennolab - no other listings under this identity, 2 shared hostnames
Zennolab - no other listings under this identity, 2 shared hostnames
What this publisher told the store about itself, and the other listings that told it the same thing.
Shared hosts - 2 hostnames
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.
Where it sends data
Destinations our analysis observed CapMonster Cloud 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.capmonster.cloud
CapMonster Cloud sends data to api.capmonster.cloud. No other extension we have analyzed sends data here.