Unverified Data Source
HIGH RISKData breach — January 2021
In January 2021, over 11M unique email addresses were discovered by Night Lion Security alongside an extensive amount of personal information including names, physical and IP addresses, phone numbers and dates of birth. Some records also contained social security numbers, driver's license details, personal financial information and health-related data, depending on where the information was sourced from. Initially attributed to Astoria Company, they subsequently investigated the incident and confirmed the data did not originate from their services.
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What happened in the Unverified Data Source data breach?
In January 2021, over 11M unique email addresses were discovered by Night Lion Security alongside an extensive amount of personal information including names, physical and IP addresses, phone numbers and dates of birth. Some records also contained social security numbers, driver's license details, personal financial information and health-related data, depending on where the information was sourced from. Initially attributed to Astoria Company, they subsequently investigated the incident and confirmed the data did not originate from their services.
The exposed data included 14 types of personal information. Financial data was included, making this breach especially dangerous for affected users. Social Security numbers were compromised, creating a long-term risk of identity theft. Learn more about what a data breach means for you.
Quick answer — was Unverified Data Source hacked?
Yes. Unverified Data Source was breached in January 2021. The breach exposed 11,498,146 records including bank account numbers, credit status information, dates of birth. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the Unverified Data Source breach so dangerous?
The Unverified Data Source breach exposed 11,498,146 records — that is 11.5M people whose personal data is now circulating on the dark web. The combination of bank account numbers, credit status information, dates of birth makes this a high-risk breach that requires immediate action.
Don't wait to find out — check if your email was exposed in this breach now.
What data was stolen in the Unverified Data Source breach?
Bank account numbers — can be used for direct financial fraud and unauthorised transactions
Credit status information — can be used for direct financial fraud and unauthorised transactions
Dates of birth — used to verify identity for account takeover and fraud
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Employers — may be combined with other breach data to build a profile for targeted attacks
Health insurance information — may be combined with other breach data to build a profile for targeted attacks
Income levels — may be combined with other breach data to build a profile for targeted attacks
IP addresses — combined with other data, used for identity theft and physical fraud
Names — used to build profiles and target you with personalised scams
Personal health data — may be combined with other breach data to build a profile for targeted attacks
Phone numbers — enables SIM swapping attacks and targeted SMS phishing scams
Physical addresses — combined with other data, used for identity theft and physical fraud
Smoking habits — may be combined with other breach data to build a profile for targeted attacks
Social security numbers — enables full identity theft including fraudulent credit applications
Is the Unverified Data Source breach still dangerous in 2026?
Yes. Stolen data from the Unverified Data Source breach remains dangerous years after the incident. Research shows that over 65% of stolen credentials from older breaches have never been changed by the account holders. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2021 are still actively used in credential stuffing attacks today.
Personal information like email addresses, phone numbers, and dates of birth never expire. Even if you changed your Unverified Data Source password, the other exposed data can be combined with information from other breaches to target you. Learn more about how long stolen data stays dangerous.
Frequently asked about the Unverified Data Source breach
Approximately 11,498,146 user records were exposed in the Unverified Data Source breach in January 2021.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Unverified Data Source password elsewhere and haven't changed it, those accounts remain at risk today.
Enter your email in the free checker on EmailLeaked. We scan 12 billion+ breach records including the full Unverified Data Source dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Unverified Data Source password immediately, change any other account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.
Who was affected by the Unverified Data Source breach?
The Unverified Data Source data breach affected approximately 11,498,146 users who had accounts with the service. With 11.5M records exposed, this is one of the larger breaches tracked in our database of 970+ known breaches.
If you ever created an account with Unverified Data Source or used their services, your data may have been included in this breach. Check your email now to find out. You can also read our guide on what to do immediately after a data breach.
If your email was in the Unverified Data Source breach
Change your Unverified Data Source password immediately
Go to Unverified Data Source and change your password right now. Use a strong, unique password that you have never used anywhere else.
Change any account sharing that password
If you used the same password on other sites, change it on every one of them. Attackers test stolen credentials on hundreds of popular sites within hours.
Enable two-factor authentication
Turn on 2FA on Unverified Data Source and every important account. Even if your password is known, attackers cannot get in without the second factor.
Check your other accounts for this breach
Run a full email check to see every breach your email appears in — not just this one.
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