Impact & Downstream Threats
This breach carries high risk due to the nature of exposed data fields and the scale of affected records.
- Credential stuffing against reused passwords across other platforms
- SIM swap attacks where phone numbers are present
- Targeted phishing campaigns using exposed email addresses
- Employment-based social engineering using job and employer data
Breach Intelligence
Executive Summary
In June 2020, the AI training data company Appen suffered a data breach exposing the details of almost 5.9 million users which were subsequently sold online. Included in the breach were names, email addresses and passwords stored as bcrypt hashes. Some records also contained phone numbers, employers and IP addresses. The data was provided to HIBP by dehashed.com.
About Appen
AI data services company.
Data Points Exposed
Dark Web Verification
Status: Confirmed
- Dataset containing approximately 5.9M 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.
Non-clients may request a breach impact review.
Frequently Asked Questions
In June 2020, Appen experienced a data breach that exposed approximately 5.9M records containing personal information.
The exposed data includes fields such as email address, employer, full name, ip address, password.
Approximately 5.9M records were affected based on current breach intelligence.
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- A public-facing individual
- A high-profile executive
- A customer of Appen
- Or concerned about credential reuse
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