A list of 1295 usernames and clear text passwords for what appears to be Minecraft gaming accounts have been posted online.
Initial username checks suggest accounts in the list are valid and may be associated with migrated accounts.
Users migrated thier accounts to developer Mojang after the end of an extensive beta test in November last year. The immensely popular game has more than 10 million active gamers as of last month.
Potential attackers would need to know the email address of users to access their migrated accounts. That credential was not posted in the list.
The news comes on the heels of a since fixed vulnerability discovered this month which allowed attackers to log in to any migrated account.
Specifically, Joinserver.jsp accepted any session key, meaning attackers need only log into a migrated account, and use the key to access any other migrated account.
Sweden-based Mojang has been contacted for comment about the list. It remains unclear if the list of stolen credentials was linked to the recent vulnerability, or how many accounts were valid.
This story will be updated as more information comes to light. Readers are invited to comment below.
Thanks to Steve from PwnedList.com for the tip off.