Kaixin001 Alleged Data Exposure
The 2011 Kaixin001 (开心网) data breach occurred in December 2011 when user databases belonging to Kaixin001 (kaixin001.com), a leading Chinese social networking platform launched in 2008, were leaked online as part of the nationwide credential exposure wave affecting major contemporary Chinese web services.
Exposed Data Types
3- Email addresses
- Passwords
- Usernames
About This Record
What information was compromised in the Kaixin001 incident?
The leaked text database files comprise 8,288,756 user credential lines. Compromised data classes include:
- User Identifiers: Internal user account sequence numbers and display handles.
- Contact Credentials: Primary email addresses (predominantly
@qq.com,@126.com,@163.com, and@sina.com). - Authentication Secrets: User account passwords stored in unencrypted plaintext.
How many accounts were affected?
Standardized RFC 5322 ASCII canonical verification confirmed 5,482,302 unique valid email addresses across 8,288,756 records.
Security advisory & credential precautions
Cleartext password exposure permits immediate credential stuffing attacks against linked email and modern online accounts. Impacted users should:
- Immediately update passwords on any service where the same login credentials were utilized.
- Adopt a password manager and enable multi-factor authentication (MFA) across critical portals.
Verification and editorial method
LeakData compares the incident name, date, affected-record count, and exposed data types with accessible sources. Unverified fields are not presented as facts, and records are updated when new evidence becomes available.
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