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// tool reference · Vulnerability & Assessment

Account & Exposure Check Free + Pro

Check breached passwords/emails and domain spoofability.

Open Account & Exposure Check →


What it does

Checks whether an email address or password appears in known breach corpora. The password path is built so that your password never leaves the browser in a usable form.

When to use it

Inputs

Field names are the actual form parameters, verified against source.

FieldTypeRequiredNotes
email email optional Address to check.
password password optional Checked via k-anonymity — see method.
domain text optional Domain-wide exposure.
authorized checkbox required You confirm the address/domain is yours.
action hidden optional Which check to run.

What you get back

Breach appearances with dates and what was exposed, plus what to do.

Worked example

Input

email = you@example.com   (authorized [x])

Output (abridged)

3 breaches contain this address

  2019  ServiceA   emails, password hashes (bcrypt)
  2021  ServiceB   emails, PLAINTEXT passwords   <- act on this one
  2023  ServiceC   emails only

Severity is about WHAT leaked, not how many. ServiceB exposed plaintext:
if that password was ever reused, treat every account sharing it as
compromised.

  -> Rotate anything reusing the ServiceB password.
  -> Enable MFA where reuse is likely.
  -> Email-only exposure = expect phishing, not takeover.

How it works

k-anonymity for passwords: the password is SHA-1 hashed locally and only the FIRST FIVE characters of that hash are sent. The range of matching hashes comes back and the comparison happens on our side of the wire — the remote service never sees enough to identify your password. Outbound requests go to fixed, hardcoded hosts.

Limits

Read live from the platform configuration.

Free— check
Pro— checks
Timeout—s

Limitations — what it does not do

Absence of evidence only. A breach that was never disclosed, never indexed, or is still private will not appear. 'No results' means 'not in known corpora' -- never 'safe'.

Privacy

Passwords are never stored, never logged, and never transmitted whole.

Standards

NIST SP 800-63B (breached-password screening)

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