In 2011, the China Software Developer Network (CSDN) suffered a data breach that exposed over 6M user records. The data included email addresses alongside usernames and plain text passwords.

CSDN
https://haveibeenpwned.com/Breach/CSDN

In 2011, the China Software Developer Network (CSDN) suffered a data breach that exposed over 6M user records. The data included email addresses alongside usernames and plain text passwords.
Thu, 27 Nov 2025 05:49:56 Z

Source: HaveIBeenpwned
Source Link: https://haveibeenpwned.com/Breach/CSDN