ShareThis
HIGH RISKData breach — July 2018
In July 2018, the social bookmarking and sharing service ShareThis suffered a data breach. The incident exposed 41 million unique email addresses alongside names and in some cases, dates of birth and password hashes. In 2019, the data appeared listed for sale on a dark web marketplace (along with several other large breaches) and subsequently began circulating more broadly. The data was provided to HIBP by dehashed.com.
search Check if you were affected — freeData exposed in this breach
What happened in the ShareThis data breach?
In July 2018, the social bookmarking and sharing service ShareThis suffered a data breach. The incident exposed 41 million unique email addresses alongside names and in some cases, dates of birth and password hashes. In 2019, the data appeared listed for sale on a dark web marketplace (along with several other large breaches) and subsequently began circulating more broadly. The data was provided to HIBP by dehashed.com.
The exposed data included 4 types of personal information. Because passwords were exposed, users who reused their password on other sites are at particular risk. Learn more about what a data breach means for you.
Quick answer — was ShareThis hacked?
Yes. ShareThis was breached in July 2018. The breach exposed 40,960,499 records including dates of birth, email addresses, names. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the ShareThis breach so dangerous?
The ShareThis breach exposed 40,960,499 records — that is 41.0M people whose personal data is now circulating on the dark web. The combination of dates of birth, email addresses, names makes this a high-risk breach that requires immediate action.
Because passwords were exposed, attackers can use credential stuffing to automatically test your ShareThis password against hundreds of other websites. If you reused your password anywhere, those accounts are now at risk. Read more about what happens to your data after a breach.
Don't wait to find out — check if your email was exposed in this breach now.
What data was stolen in the ShareThis breach?
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
Names — used to build profiles and target you with personalised scams
Passwords — can be used to access your accounts directly or cracked to reveal your actual password
Is the ShareThis breach still dangerous in 2026?
Yes. Stolen data from the ShareThis 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 2018 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 ShareThis 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 ShareThis breach
Approximately 40,960,499 user records were exposed in the ShareThis breach in July 2018.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your ShareThis 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 ShareThis dataset and tell you instantly whether your email was exposed and what data was taken.
Change your ShareThis 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 ShareThis breach?
The ShareThis data breach affected approximately 40,960,499 users who had accounts with the service. With 41.0M records exposed, this is one of the larger breaches tracked in our database of 970+ known breaches.
If you ever created an account with ShareThis 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 ShareThis breach
Change your ShareThis password immediately
Go to ShareThis 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 ShareThis 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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