> JapanHacked_
[Contained][Severity: Major][Web app exploit]

Shikoku Create Association: unauthorized website administrator puts 146 submissions from 92 people at risk

A website flaw allowed an unauthorized administrator account. Data in 146 inquiry/job-application submissions from 92 people may have been exposed.

Disclosed

2026-11-09

Organizations involved

1

Leaked or at risk

146

146

Downtime

Unknown

People affected or at risk

92

92

Submissions, people and confirmed findings

An unauthorized administrator account was found on 4 November, apparently created through a website flaw on 20–21 July. At-risk data comprises 124 inquiries and 22 job applications: 146 submissions from 92 people. Fields include names, contacts, employers, job preferences and free text, varying by form. Submissions are not a person count. [1]

Available records show no use of the account to log into administration, tamper with the site, install malicious programs or acquire personal data; exposure cannot be ruled out. On 4 November, it removed the account, changed credentials, updated software, restricted administration and stopped storing form submissions on the site. The PPC was notified and individual notification is planned. [1]

Timeline

  1. Started 2026-07-20
  2. Detected 2026-11-04
  3. Disclosed 2026-11-09
  4. 112 days

Organizations involved

Sources

  1. [1][Official]不正アクセスによる個人情報漏えいのおそれに関するお知らせとお詫びShikoku Create Association · 2026-11-09