Was your data in the FlexBooker breach?
Check whether your email address was in it
Check my exposureFree. No password — we email you a six-digit code. This breach and every other one your address appears in.
FlexBooker (flexbooker.com) suffered a data breach in 2021 that exposed around 3,756,794 accounts. If you had an account, some of your personal data may be circulating in leaked databases. The fastest way to know is to check your own email — free, in about 30 seconds, no password required.
What happened
In December 2021, the online booking service FlexBooker suffered a data breach that exposed 3.7 million accounts. The data included email addresses, names, phone numbers and for a small number of accounts, password hashes and partial credit card data. FlexBooker has identified the breach as originating from a compromised account within their AWS infrastructure. The data was found being actively traded on a popular hacking forum.
Breach record from Have I Been Pwned, CC BY 4.0. Risk analysis by Nullivo.
What was exposed, and why it matters
Not all breaches carry the same risk — what matters is which fields leaked. Here is what the FlexBooker breach exposed and what each item actually enables:
What to do if you were affected
These steps are ordered for this specific breach — the most urgent action given what leaked comes first.
- Payment or bank details
Contact your bank, ask them to monitor or reissue the card, and check statements for small “test” transactions. - Passwords
Change this password everywhere you have reused it, starting with your email account — whoever controls your email can reset everything else. - Phone numbers
Move two-factor authentication off SMS to an authenticator app or passkey, and add a port-out PIN with your mobile provider. - Names and usernames
Search your usual username to see what else it exposes, and use distinct handles for sensitive accounts. - Email addresses
Treat any message referencing this service with suspicion, and never act on links in unexpected emails. - Confirm you were actually in it
Run a free scan before you spend time on the steps above.
How urgent is this now?
This data has been circulating for around 5 years, which means it has been copied, combined with other leaks and indexed by search tools many times over.
Passwords are the reason breach age matters less than people expect. Leaked credentials are compiled into wordlists that get tried against new services for years afterwards, so a password exposed here is unsafe to use anywhere, ever again.
Remember: a breach can’t be “un-leaked” — once a database is out, it exists in countless copies. The goal is to make the leaked data useless: change what can be changed, lock down what can’t, and remove what has been republished.
Frequently asked questions
What data was exposed in the FlexBooker breach?
The FlexBooker breach exposed payment or bank details, passwords, phone numbers, names and usernames, email addresses. Direct financial fraud, plus convincing scam calls that quote your real card or account details to establish trust.
How many people were affected by the FlexBooker breach?
Around 3,756,794 accounts were exposed, making it a large breach.
What should I do if I had a FlexBooker account?
Contact your bank, ask them to monitor or reissue the card, and check statements for small “test” transactions. You can check whether your own email appears in this breach with a free Nullivo scan — no password required.
Breaches that exposed similar data
If the FlexBooker breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.