Club Penguin Rewritten (January 2018)

In January 2018, the children's gaming site Club Penguin Rewritten (CPRewritten) suffered a data breach (note: CPRewritten is an independent recreation of Disney's Club Penguin game). The incident exposed almost 1.7 million unique email addresses alongside IP addresses, usernames and passwords stored as bcrypt hashes. When contacted, CPRewritten advised they were aware of the breach and had "contacted affected users".

Record: 1.7 million

Ster-Kinekor

In 2016, the South African cinema company Ster-Kinekor had a security flaw which leaked a large amount of customer data via an enumeration vulnerability in the API of their old website. Whilst more than 6 million accounts were leaked by the flaw, the exposed data only contained 1.6 million unique email addresses. The data also included extensive personal information such as names, addresses, birthdates, genders and plain text passwords.

Record: 1.6 million

Clash of Kings

In July 2016, the forum for the game "Clash of Kings" suffered a data breach that impacted 1.6 million subscribers. The impacted data included usernames, IP and email addresses and passwords stored as MD5 hashes. The data was provided to HIBP by dehashed.com.

Record: 1.6 million

ActMobile

In October 2021, security researcher Bob Diachenko discovered an exposed database he attributed to ActMobile, the operators of Dash VPN and FreeVPN. The exposed data included 1.6 million unique email addresses along with IP addresses and password hashes, all of which were subsequently leaked on a popular hacking forum. Although usage of the service was verified by HIBP subscribers, ActMobile denied the data was sourced from them and the breach has subsequently been flagged as "unverified".

Record: 1.6 million

Dungeons & Dragons Online

In April 2013, the interactive video game Dungeons & Dragons Online suffered a data breach that exposed almost 1.6M players' accounts. The data was being actively traded on underground forums and included email addresses, birth dates and password hashes.

Record: 1.6 million

PayHere

In late March 2022, the Sri Lankan payment gateway PayHere suffered a data breach that exposed more than 65GB of payment records including over 1.5M unique email addresses. The data also included IP and physical addresses, names, phone numbers, purchase histories and partially obfuscated credit card data (card type, first 6 and last 4 digits plus expiry date). A month later, PayHere published a blog on the incident titled Ensuring Integrity on PayHere Cybersecurity Incident.

Record: 1.6 million

James

In June 2020, 14 previously undisclosed data breaches appeared for sale including the Brazilian delivery service, "James". The breach occurred in March 2020 and exposed 1.5M unique email addresses, customer locations expressed in longitude and latitude and passwords stored as bcrypt hashes. The data was provided to HIBP by dehashed.com.

Record: 1.5 million

Nival

In February 2016, the Russian gaming company Nival was the target of an attack which was consequently detailed on Reddit. Allegedly protesting "the foreign policy of Russia in regards to Ukraine", Nival was one of several Russian sites in the breach and impacted over 1.5M accounts including sensitive personal information.

Record: 1.5 million

Army Force Online

In May 2016, the online gaming site Army Force Online suffered a data breach that exposed 1.5M accounts. The breached data was found being regularly traded online and included usernames, email and IP addresses and MD5 passwords.

Record: 1.5 million

GameSalad

In February 2019, the education and game creation website Game Salad suffered a data breach. The incident impacted 1.5M accounts and exposed email addresses, usernames, IP addresses and passwords stored as SHA-256 hashes. The data was provided to HIBP by a source who requested it be attributed to "JimScott.Sec@protonmail.com".

Record: 1.5 million