What was exposed, when it happened, and which databases confirm it.
- accounts
- 17,351
- Breached
- November 15, 2025
- Last Update
- November 23, 2025
Were you caught in this breach?
Search your email, phone number or username against every record CheckLeaked indexes.
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What happened
In November 2025, the online coding practice tool CodeStepByStep suffered a data breach that exposed 17k records. The impacted data included names, usernames and email addresses.
Compromised Info
- Email addresses
- Names
- Usernames
Attestation
Four independent databases catalog this breach and they do not always agree. Each lane below is one source’s own count.
Sources & Link Methods
- HIBP
FAQ
What was leaked in the CodeStepByStep breach?
The CodeStepByStep breach exposed: Email addresses, Names, and Usernames.
When did the CodeStepByStep breach happen?
The CodeStepByStep breach was disclosed on November 15, 2025 and affected 17,351 records.
Am I affected by the CodeStepByStep breach?
Search your email, phone or username at checkleaked.cc to find out whether your data appears in the CodeStepByStep leak.