HIGH SEVERITYSocial

tumblr Data Breach

Verified by ObscureIQ Intelligence
Xinf@

7.5Severity
65.5MRecords
2Data Fields
2013Year

Impact & Downstream Threats

This breach carries high risk due to the nature of exposed data fields and the scale of affected records.

Primary downstream threats:
  • Credential stuffing against reused passwords across other platforms
  • Targeted phishing campaigns using exposed email addresses

Breach Intelligence

Entitytumblr
OrganizationPrivate Company • USA
Breach DateFebruary 2013
Disclosure42519.0
Records Exposed~65.5M
Attack VectorMisconfiguration
SourceHave I Been Pwned / DataBreach.com / ObscureIQ intelligence
StatusConfirmed

Executive Summary

In early 2013, tumblr suffered a data breach which resulted in the exposure of over 65 million accounts. The data was later put up for sale on a dark market website and included email addresses and passwords stored as salted SHA1 hashes.

About tumblr

Microblogging and social media platform.

Private CompanyUSAtumblr.com

Data Points Exposed

Verified fields in the released dataset:
Email addresses
Passwords

Dark Web Verification

Status: Confirmed

  • Dataset containing approximately 65.5M records identified in breach intelligence sources.
  • The data is indexed and searchable across breach notification platforms.

Recommended Actions

⚠️ Do not assume this is low sensitivity.

Change Passwords
Change your tumblr password immediately and any account sharing similar credentials.
Expect Targeted Phishing
Watch for emails referencing this breach. Verify communications through official channels.
Secure Email & Enable MFA
Email compromise is often the first pivot point. Enable multi-factor authentication.
Monitor Financial Accounts
Watch for unauthorized credit applications and suspicious activity.
Check Your Exposure
ObscureIQ clients: this breach is indexed in your profile.
Non-clients may request a breach impact review.

Frequently Asked Questions

What happened in the tumblr data breach?▾

In February 2013, tumblr experienced a data breach that exposed approximately 65.5M records containing personal information.

What data was exposed?▾

The exposed data includes fields such as email address, password.

How many records were affected?▾

Approximately 65.5M records were affected based on current breach intelligence.

Protect Yourself

Check If You’re Affected

Enter your email to check if your data appears in this breach.

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High-Risk? Get an Exposure Audit

Full-spectrum exposure audits for executives and public figures.

Request Consultation

ObscureIQ Advisory

We combine proprietary dark web access with commercial and restricted breach intelligence to verify exposure and assess real-world risk.

If you are:
  • A public-facing individual
  • A high-profile executive
  • A customer of tumblr
  • Or concerned about credential reuse
Services
AuditsWipesThreat MonitoringTraining
Contact
Phone(855) 763-7273Emailinfo@obscureiq.com

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Classification Tags

MisconfigurationSocialEmailPasswords

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