CodeStepByStep, an online coding practice tool used for computer science education, has allegedly been compromised in a significant security incident. In November 2025, a dataset purportedly containing the platform’s user records was leaked on a cybercrime forum. The exposure affects approximately 17,000 users, and the leaked information is now circulating publicly.
According to the claims accompanying the leak, the compromised data includes:
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User IDs
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Full names
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Email addresses
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Usernames
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Education details (including school names and IDs)
