> JapanHacked_
[Resolved][Severity: Moderate][Misdelivery]

Okinawa Prefecture: an email about a teacher candidate exam to 3,000 applicants had addresses entered in the wrong field, so they were visible to the other recipients

Addresses were entered in the wrong field of an email to 3,000 applicants, so 11 groups of about 300 could see each other's addresses.

Disclosed

2021-06-08

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

What happened

  1. From 14:07 to 14:11, it sent emails about a schedule change of the 2021 teacher candidate exam. The recipients' addresses were entered in the To field by mistake. [1] [2]

  2. It announced the case. [1]

Impact and response

It sent the email to 3,000 applicants in 11 groups, and about 300 addresses per group became visible to the recipients. After the problem came to light, it apologized to the applicants concerned. [1] [2]

Timeline

  1. Detected, Disclosed 2021-06-08
  2. 1 days

Attack or cause

Method
[Misdelivery]
Impact
[Data leak]
Entry point
Unknown

Data exposed or at risk

[E-mail address]

Organizations involved

Open in organization search

Sources

  1. [1][Official]誤送信によるメールアドレスの流出《お詫び》Okinawa Prefecture · 2021-06-08
  2. [2][News]メール誤送信で教員選考試験受験者のメアド流出 - 沖縄県Security NEXT · 2021-06-21