CodeStepByStep
MEDIUM RISKData breach — November 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.
search Check if you were affected — freeData exposed in this breach
What happened in the CodeStepByStep data breach?
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.
The exposed data included 3 types of personal information. Learn more about what a data breach means for you.
Quick answer — was CodeStepByStep hacked?
Yes. CodeStepByStep was breached in November 2025. The breach exposed 103,077 records including email addresses, names, usernames. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.
Why was the CodeStepByStep breach so dangerous?
The CodeStepByStep breach exposed 103,077 records — that is a large number of compromised accounts. The combination of email addresses, names, usernames makes this a medium-risk breach that should be addressed promptly.
Don't wait to find out — check if your email was exposed in this breach now.
What data was stolen in the CodeStepByStep breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Names — used to build profiles and target you with personalised scams
Usernames — used to build profiles and target you with personalised scams
Is the CodeStepByStep breach still dangerous in 2026?
Yes. Stolen data from the CodeStepByStep breach remains dangerous years after the incident. Research shows that over 65% of stolen credentials from older breaches have never been changed by the account holders. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2025 are still actively used in credential stuffing attacks today.
Personal information like email addresses, phone numbers, and dates of birth never expire. Even if you changed your CodeStepByStep password, the other exposed data can be combined with information from other breaches to target you. Learn more about how long stolen data stays dangerous.
Frequently asked about the CodeStepByStep breach
Approximately 103,077 user records were exposed in the CodeStepByStep breach in November 2025.
Yes. Leaked credentials are actively used in credential stuffing attacks years after a breach. If you reused your CodeStepByStep password elsewhere and haven't changed it, those accounts remain at risk today.
Enter your email in the free checker on EmailLeaked. We scan 12 billion+ breach records including the full CodeStepByStep dataset and tell you instantly whether your email was exposed and what data was taken.
Change your CodeStepByStep password immediately, change any other account where you used the same password, enable two-factor authentication on all important accounts, and monitor for phishing emails over the next 90 days.
Who was affected by the CodeStepByStep breach?
The CodeStepByStep data breach affected approximately 103,077 users who had accounts with the service. While not the largest breach on record, it still represents a significant number of compromised accounts in our database of 970+ known breaches.
If you ever created an account with CodeStepByStep or used their services, your data may have been included in this breach. Check your email now to find out. You can also read our guide on what to do immediately after a data breach.
If your email was in the CodeStepByStep breach
Change your CodeStepByStep password immediately
Go to CodeStepByStep and change your password right now. Use a strong, unique password that you have never used anywhere else.
Change any account sharing that password
If you used the same password on other sites, change it on every one of them. Attackers test stolen credentials on hundreds of popular sites within hours.
Enable two-factor authentication
Turn on 2FA on CodeStepByStep and every important account. Even if your password is known, attackers cannot get in without the second factor.
Check your other accounts for this breach
Run a full email check to see every breach your email appears in — not just this one.
searchCheck all my breaches — freeOther major breaches
Was my email hacked?
Check if your email is compromised in seconds. Free, private, no signup. Scan 12 billion+ records across 970+ known breaches.
search Check my email now — it's freeNo signup required · Results in under 5 seconds · Your data is never stored