According to Security NEXT, on the evening of December 17, 2024, a prefectural high school in Saitama Prefecture uploaded a seminar video intended only for students but mistakenly set its visibility permissions to public [1]. School officials discovered the issue the following morning; the video contained the names of four students [1]. The video has since been set to private, the school explained the matter and apologized to the students and parents, and the prefectural government instructed all prefectural schools to strengthen personal data management [1].
This event has not been officially confirmed. Content is based on media or third-party reports.
Backfill: this event became public on Dec 27, 2024 and we added it on Nov 10, 2026. It is not a new event.
MediumMonitoringBackfillMedia reported
Saitama Prefectural High School Accidentally Sets Seminar Video Containing Four Students' Names to Public
1 min read
- Disclosed
- Dec 27, 2024
- Published
- Nov 10, 2026
- Last updated
- Nov 7, 2026
- CVSS basis
- Our assessment
- Attack vector
- Impact
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Education
What to do nowOur advice
The video has since been set to private, the school explained the matter and apologized to the students and parents, and the prefectural government instructed all prefectural schools to strengthen personal data management [1].
Timeline
- Security NEXT publishes report (date only; timestamp is a placeholder)[1]
Technical details
Verified Source Summary
On the evening of December 17, 2024, a prefectural high school in Saitama Prefecture uploaded a seminar video intended only for students but mistakenly set its visibility permissions to public [1].
School officials discovered the issue the following morning; the video contained the names of four students [1].
The video has since been set to private, the school explained the matter and apologized to the students and parents, and the prefectural government instructed all prefectural schools to strengthen personal data management [1].
References
Media1
- [1]
“埼玉県は、県内高校において、生徒の個人情報含む動画が外部から一時閲覧できる状態になっていたことを明らかにした。”
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