White Essence: unauthorized access to its booking site and core system
White Essence, a teeth whitening service, found unauthorized access on 5 August and stopped its booking site and core system from 12 August. Its 5 October announcement said a vulnerability in the booking site's program was exploited and used as a foothold into the core system. Data of about 1.05 million accounts registered as of 5 August was taken, including names, addresses, phone numbers, emails, birth dates, genders, employers and encrypted login IDs and passwords. Affected people include customers, member clinic staff and head office employees.
Disclosed
2026-08-12
Organizations involved
1
Leaked or at risk
1.1M
1,050,000
Downtime
Unknown
Timeline
- Detected 2026-08-05
- Disclosed 2026-08-12
- 7 days
Attack or cause
- Method
- [Web app exploit]
- Impact
- [Data leak][Service outage]
- Entry point
- Web app
Data exposed or at risk
Organizations involved
[Breached][Critical]Tokyo, ShibuyaMedical care and welfare1,050,000 leaked
White Essence Co., Ltd.
Sources
- [1][Official]不正アクセスによる個人情報の漏えいに関するお詫びとお知らせWhite Essence · 2026-10-05
- [2][Official]弊社システムへの不正アクセスに伴う予約サイトおよびシステム一時停止のお知らせWhite Essence · 2026-08-12
- [3][News]ホワイトエッセンス、約105万アカウントの個人情報流出 8月発表の不正アクセス調査で判明ITmedia NEWS · 2026-10-05