> JapanHacked_
[Contained][Severity: Critical][Intrusion][Credential abuse]

PR TIMES: admin system intrusion; data may have leaked

An intrusion beginning April 24 was detected on April 25. A shared administrative account and allowed IP address were abused, and backdoors were installed. Up to 901,603 personal records and 1,682 unreleased announcements from 1,182 companies were potentially exposed. Malicious access was blocked by April 30; distribution services were unaffected. On December 16 it completed migration away from the old internal administration system and implemented permanent deletion of deleted data after 30 days. Misuse remained unconfirmed.

Disclosed

2025-05-07

Organizations involved

1182

Leaked or at risk

901.6K

901,603

Downtime

Unknown

Timeline

  1. Started 2025-04-24
  2. Detected 2025-04-25
  3. Disclosed 2025-05-07
  4. 13 days

Organizations involved

Open in organization search

Sources

  1. [1][Official]不正アクセスによる情報漏えいの可能性に関するお詫びとご報告PR TIMES Corporation · 2025-05-07
  2. [2][Official]新管理者画面への移行完了および削除済みデータの保持期間に関するシステム実装のお知らせPR TIMES · 2025-12-16