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OfferBox: misconfiguration may have exposed student names/emails in enterprise page traffic

Possible data leak: Enterprise-facing pages included student name/email in response payloads viewable via browser developer tools (not on the normal UI). Disclosed Oct 5, 2026. Lead cites up to 314,009; page uses max-style framing → blank.

Last updated: 2026-11-09

Overview

“Up to” wording → blank.

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. 「OfferBox」システム設定不備に伴うお詫びとお知らせ株式会社i-plug · 2026-11-09

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