SignalAtlas
Share a reportManage my posts
Investigating

Study Sapuri: feature abuse may have identified 3,687 registered email addresses

On Sep 30, 2026, abuse of a feature gap may have identified 3,687 emails as Study Sapuri registrations; disclosed Oct 3. No name/password/payment exfiltration found. Fix completed same day.

Last updated: 2026-11-09

Overview

3,687 records.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

  1. 【重要】スタディサプリへの不正利用に関するお詫びとお知らせ株式会社リクルート · 2026-11-09

Related information

Share a report

No published information yet

Information appears here after source checks or moderation.

Comments and replies

Write a comment

No account needed. Comments appear immediately.

Do not post private names, addresses, passwords, or codes. Automatic masking is limited; review your content before submitting.

Required fields are marked *.

After submitting the text, you can redact and attach images.

Loading the security check. You can submit once it is complete.