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Response snapshot Oct 27, 2026, 04:12 UTC

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Disclosed incidenthibp-codestepbystep

CodeStepByStep breach: 103,077 accounts exposed

In November 2025, the online coding practice tool CodeStepByStep suffered a data breach that exposed 17k records which were subsequently published online . The following month, a further corpus of data was released bringing the total to 103k.

At a glance

Sources
2 independent sources

What to do

If you or your organization used this service, change reused passwords, watch for phishing that uses the exposed data, and check the disclosure for the organization's guidance.

Read Have I Been Pwned: CodeStepByStep (opens a new tab)

What happened

In November 2025, the online coding practice tool CodeStepByStep suffered a data breach that exposed 17k records which were subsequently published online . The following month, a further corpus of data was released bringing the total to 103k. The impacted data included names, usernames and email addresses.

Related technology

Sources

  1. Primary source

    Have I Been Pwned: CodeStepByStep (opens a new tab)

    Verified breach loaded into Have I Been Pwned: account count, exposed data types, and dates.

    Published Checked

  2. Primary source

    CodeStepByStep disclosure (opens a new tab)

    The organization's own breach disclosure, as linked by Have I Been Pwned.

    Published Date not suppliedChecked

  3. Primary source

    Have I Been Pwned breach API (opens a new tab)

    The breach list that supplied this entry.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2025, December 2). CodeStepByStep breach: 103,077 accounts exposed. https://kevwire.com/record/hibp-codestepbystep

MLA

"CodeStepByStep breach: 103,077 accounts exposed." KEVWire, 2 Dec. 2025, kevwire.com/record/hibp-codestepbystep.

Chicago

KEVWire. "CodeStepByStep breach: 103,077 accounts exposed." Last modified December 2, 2025. https://kevwire.com/record/hibp-codestepbystep.

Evidence summary (plain text)

CodeStepByStep breach: 103,077 accounts exposed (Nov 23, 2025).
In November 2025, the online coding practice tool CodeStepByStep suffered a data breach that exposed 17k records which were subsequently published online . The following month, a further corpus of data was released bringing the total to 103k. The impacted data included names, usernames and email addresses.
Sources:
Have I Been Pwned: CodeStepByStep: https://haveibeenpwned.com/Breach/CodeStepByStep
CodeStepByStep disclosure: https://www.codestepbystep.com/r/system/breach-disclosure-2025-11-23
Have I Been Pwned breach API: https://haveibeenpwned.com/api/v3/breaches
Record ID: hibp-codestepbystep.
Record origin: Ingested record.
AI evidence: Not assessed.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 03:25 UTC. Ingestion is not an independent editorial investigation.

Verified by Have I Been Pwned. Breach date: 2025-11-15; loaded 2025-11-23. Exposed data: Email addresses, Names, Usernames. Counts are accounts in the loaded data, not necessarily distinct people.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

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