Data breaches → HTH Studios
Was your data in the HTH Studios breach?
2018 · hthstudios.com · ~411,755 accounts exposedCritical severity · 9/10
HTH Studios (hthstudios.com) suffered a data breach in 2018 that exposed around 411,755 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 August 2018, the adult furry interactive game creator HTH Studios suffered a data breach impacting multiple repositories of customer data. Several months later, the data surfaced on a popular hacking forum and included 411k unique email addresses along with physical and IP addresses, names, orders, salted SHA-1 and salted MD5 hashes. HTH Studios is aware of the incident.
Breach details sourced from Have I Been Pwned, the industry-standard breach database. 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 HTH Studios breach exposed and what each item actually enables:
Home addresses feed people-search and data-broker sites, which republish them publicly. They also make phishing far more convincing and, in the worst cases, enable real-world harassment.
Date of birth is a permanent identifier used to verify identity by phone. Combined with a name and address it is often enough to impersonate you.
Enables SIM-swap attacks (hijacking your number to intercept SMS codes), smishing, and voice scams that appear to come from your bank.
Links this leak to your other accounts — a reused username lets anyone build a profile of you across platforms.
Puts you on spam and phishing lists, and confirms to attackers that you hold an account with this service — which makes impersonation emails more believable.
Reveals your approximate location and internet provider, which adds credibility to targeted scams.
Also listed in this breach: Browser user agent details, Dates of birth, Email addresses, IP addresses, Names, Phone numbers, Physical addresses, Purchases, 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.
- Home addresses: Get your address removed from data brokers — they re-list roughly every four months, so this needs repeating.
- Dates of birth: Never confirm your date of birth to an inbound caller — hang up and dial the organisation back on a published number.
- 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.
- Check whether your own email appears in this breach — run a free scan to confirm before you spend time on the steps above.
This breach put your details on data-broker sites
Because HTH Studios exposed home addresses, this is one of the breaches that feeds people-search and data-broker sites. Those sites scrape leaked databases, combine them with public records, and republish the result as a searchable profile — which is how a single breach turns into a permanent public listing. Removal works, but brokers typically re-list within about four months, so it has to be repeated.
See our broker-by-broker removal guides →
How urgent is this now?
This breach is over 8 years old. Old credentials still cause harm — leaked passwords from a decade ago are still tried against new accounts every day.
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 HTH Studios breach?
The HTH Studios breach exposed home addresses, dates of birth, phone numbers, names and usernames, email addresses, ip addresses. Home addresses feed people-search and data-broker sites, which republish them publicly. They also make phishing far more convincing and, in the worst cases, enable real-world harassment.
How many people were affected by the HTH Studios breach?
Around 411,755 accounts were exposed, making it a mid-sized breach.
What should I do if I had a HTH Studios account?
Get your address removed from data brokers — they re-list roughly every four months, so this needs repeating. 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 HTH Studios breach affected you, these breaches exposed comparable information — worth checking too, since leaked datasets are routinely combined.
- Was your data in the Fashion Nexus breach? (2018, ~1,279,263 accounts)
- Was your data in the University of Nottingham breach? (2026, ~454,635 accounts)
- Was your data in the NetGalley breach? (2020, ~1,436,435 accounts)
- Was your data in the Regpack breach? (2016, ~104,977 accounts)
- Was your data in the ZAP-Hosting breach? (2021, ~746,682 accounts)
- Was your data in the Bourse des Vols breach? (2021, ~1,460,130 accounts)