Update: Microsoft clarified in a statement to The Guardian that none of Mojang's servers were compromised, meaning that the leaked passwords and usernames were the result of an unrelated hack.
Microsoft's statements will no doubt reassure users concerned about the safety of their accounts.
Original story follows
A plain text file of over 1,800 Minecraft usernames and passwords has leaked online. At this stage, it is unclear as to how the details were obtained, or if the leak itself is a precursor to a much larger attack targeted at Minecraft.
The details available in the leak (which has been posted to Pastebin) allow anyone to log in to a legitimate user's account to download and install the full version of the game. More worrisome is the fact that the hack exposes the affected users to more malicious attacks if they've reused the password on other services.
According to security researcher Graham Cluley:
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Harish Jonnalagadda is a Senior Editor overseeing Asia for Android Central, Windows Central's sister site. When not reviewing phones, he's testing PC hardware, including video cards, motherboards, gaming accessories, and keyboards.