Education
Classi
Classi (run by Benesse Corporation) was hit in 1 recorded cybersecurity incident. The latest was disclosed on 2020-04-13.
About the service
- Website
- https://classi.jp/
- Run by
- Benesse Corporationsince 2026-04-01
- Formerly run by
- Classi Corp.until 2026-04-01
- Category
- Education
- For
- People and businesses
Incident history
Disclosed 2020-04-13Updated 2021-05-19 08:00Tokyo[Resolved][Severity: Critical][Breached][Critical]
Classi: attackers used credentials phished from a developer to break into the school platform and leak the IDs and encrypted passwords of all 1.22 million users[Phishing][Credential abuse][Data leak][Service outage]Leaked 1.2MOrganizations 1