Disqus
HIGH RISKData breach — July 2012
In October 2017, the blog commenting service Disqus announced they'd suffered a data breach. The breach dated back to July 2012 but wasn't identified until years later when the data finally surfaced. The breach contained over 17.5 million unique email addresses and usernames. Users who created logins on Disqus had salted SHA1 hashes of passwords whilst users who logged in via social providers only had references to those accounts.
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What happened in the Disqus data breach?
In October 2017, the blog commenting service Disqus announced they'd suffered a data breach. The breach dated back to July 2012 but wasn't identified until years later when the data finally surfaced. The breach contained over 17.5 million unique email addresses and usernames. Users who created logins on Disqus had salted SHA1 hashes of passwords whilst users who logged in via social providers only had references to those accounts.
The exposed data included 3 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 Disqus hacked?
Yes. Disqus was breached in July 2012. The breach exposed 17,551,044 records including email addresses, passwords, usernames. 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 Disqus breach so dangerous?
The Disqus breach exposed 17,551,044 records — that is 17.6M people whose personal data is now circulating on the dark web. The combination of email addresses, passwords, usernames makes this a high-risk breach that requires immediate action.
Because passwords were exposed, attackers can use credential stuffing to automatically test your Disqus 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 Disqus breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Passwords — can be used to access your accounts directly or cracked to reveal your actual password
Usernames — used to build profiles and target you with personalised scams
Is the Disqus breach still dangerous in 2026?
Yes. Stolen data from the Disqus 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 2012 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 Disqus 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 Disqus breach
Approximately 17,551,044 user records were exposed in the Disqus breach in July 2012.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your Disqus 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 Disqus dataset and tell you instantly whether your email was exposed and what data was taken.
Change your Disqus 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 Disqus breach?
The Disqus data breach affected approximately 17,551,044 users who had accounts with the service. With 17.6M records exposed, this is one of the larger breaches tracked in our database of 970+ known breaches.
If you ever created an account with Disqus 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 Disqus breach
Change your Disqus password immediately
Go to Disqus 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 Disqus 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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