Knuddels data breach (2018): was your email exposed?
Knuddels (knuddels.de) suffered a data breach in September 2018 that exposed around 808,330 accounts. The leaked records included email addresses, geographic locations, names, passwords and usernames. Check whether your email was caught up in it — and lock down your accounts before the data is misused.
Check if my email was exposed — free →What happened in the Knuddels breach?
Knuddels (knuddels.de) was hit by a data breach dated September 2018, exposing around 808,330 accounts. Incidents like this happen when attackers break into a company’s user database, or when a misconfigured server or third-party partner leaks it — and the stolen records then spread among other criminals.
The exposed records included email addresses, geographic locations, names, passwords and usernames. Leaked data doesn’t simply disappear: it gets copied, sold and re-posted across breach forums and dark-web markets for years. That’s why your information from the Knuddels breach can still be abused long after the original incident — and why checking your exposure and locking down your accounts matters even now.
What data was exposed in the Knuddels breach?
The Knuddels breach exposed email addresses, geographic locations, names, passwords and usernames. The more of these are tied to you, the more ways an attacker can impersonate you or break into your other accounts.
How the leaked Knuddels data can be used against you
Because the Knuddels breach exposed email addresses, geographic locations, names, passwords and usernames, the leaked passwords let attackers try the same login on your other accounts (credential stuffing), so any site where you reused it is at risk; your email address becomes a target for convincing phishing, often referencing this very breach to look legitimate; and your address can be used to locate you, sold on to people-search sites, or used in doxxing.
How to check if you were affected
The leaked records themselves aren’t published openly, so the way to know is to check your email against known breach and dark-web databases. Our free tool does exactly that in a few seconds — no account needed.
Check my email against known breaches — free →What to do if your Knuddels account was breached
These steps are prioritized for exactly the kind of data the Knuddels breach exposed.
Reset your Knuddels password now, and change it on every other account where you used the same one. Reused passwords are how a single breach turns into a chain of account takeovers, so give each important account its own strong password (a password manager makes this painless).
Add 2FA — ideally an authenticator app or a passkey rather than SMS — to your email, banking and other important accounts, so a stolen password alone can’t get in.
Exposed addresses spread to people-search sites that anyone can look up. Opting out of data brokers makes your home harder to find and lowers your doxxing risk.
Scammers reference real breaches to sound credible, so treat any email mentioning Knuddels with suspicion, and never use a password-reset link you didn’t request — go to the site directly instead.
Leaked data is resold for years, so a one-time clean-up isn’t enough. Ongoing breach and dark-web monitoring tells you the moment your details reappear, so you can act before an account is misused.
The Knuddels breach, answered
Was my email in the Knuddels breach?
You can find out in seconds with our free breach and dark-web check — enter your email and it tells you whether it appears in the Knuddels breach and other known incidents.
When did the Knuddels breach happen?
The Knuddels data breach is dated September 2018 and exposed roughly 808,330 accounts. Note that breached data often surfaces and is resold long after the original date.
What data was exposed in the Knuddels breach?
The exposed records included email addresses, geographic locations, names, passwords and usernames. Around 808,330 accounts were affected.
What should I do after the Knuddels breach?
Change your Knuddels password and any reused passwords, turn on two-factor authentication, watch for phishing that references Knuddels, and monitor whether your details resurface on the dark web.
Was your email in the Knuddels breach?
Check free in about a minute — then we’ll help you remove your exposed data and keep it monitored.
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