Was your data in the Mangatoon 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.
Mangatoon (mangatoon.mobi) suffered a data breach in 2022 that exposed around 23,040,238 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 May 2022, the Hong Kong based Manga service Mangatoon suffered a data breach that exposed 23M subscriber records. The breach exposed names, email addresses, genders, social media account identities, auth tokens from social logins and passwords stored as salted MD5 hashes. Mangatoon did not respond to multiple attempts to make contact regarding the breach.
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 Mangatoon breach exposed and what each item actually enables:
Also listed in this breach: Auth tokens, Avatars, Email addresses, Genders, Names, Passwords, Social media profiles, Usernames.
What to do if you were affected
These steps are ordered for this specific breach — the most urgent action given what leaked comes first.
- Passwords
Change this password everywhere you have reused it, starting with your email account — whoever controls your email can reset everything else. - 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 4 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 Mangatoon breach?
The Mangatoon breach exposed passwords, names and usernames, email addresses. Attackers replay leaked passwords across other sites (“credential stuffing”). Because most people reuse passwords, one leak often unlocks email, shopping and banking accounts elsewhere.
How many people were affected by the Mangatoon breach?
Around 23,040,238 accounts were exposed, making it a very large breach by any measure.
What should I do if I had a Mangatoon account?
Change this password everywhere you have reused it, starting with your email account — whoever controls your email can reset everything else. 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 Mangatoon breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.