SHINDO3

Ibaraki Prefecture

Names86records

LEAK CONFIRMEDPostal address / Phone numberMisconfiguration · Contained

Open in the live monitor ▶
Disclosed
May 30, 2025
Detected
May 8, 2025
Detection to disclosure
22 days
Leak
Leak confirmed
Type
Misconfiguration
Status
Contained
Security spend
Not checked yet
Compensation
Not announced

What leaked

IdentityFull name
ContactAddress, Phone number, Email address
Transactions & activityResident consultations and similar

How many

  • Names 86 records
  • Addresses 53 records
  • Phone numbers 4 records
  • Email addresses 2 records

Who is affected

  • People who made resident consultations and similar requests received in July 2022

Cause

During a server OS update, the maintenance contractor left a non-public file created in an output test on the public-facing server

Timeline

  1. Detected
  2. Exposure ended
  3. Date of the Security NEXT report

Response

  • Data deleted
  • Vendor review

Deleted the file from the public server. Requires the contractor to confirm that no files with personal data are on public servers and to report the results at bimonthly maintenance

What you should do

  1. Don't open links in emails from this company. The apology email itself may be fake
  2. Treat refund or apology calls and texts as scams. Call back only on the number from the official site
  3. Watch for unexpected mail or invoices; your address is hard to change
  4. Check the company's notice to see if you're affected

Lessons for companies

  1. Put security requirements, audit rights and reporting deadlines in vendor contracts
  2. Two-person review and pre-release tests for sharing and cache changes; monitor cloud config (CSPM)
  3. Report to the PPC: preliminary in 3–5 days, final in 30 (60 if malicious)
  4. Run red teaming and AI-assisted hardening, and publish how much you invest

Sources