> JapanHacked_
[Contained][Severity: Major][Web app exploit]

Cover: unauthorized access to the hololive OFFICIAL CARD GAME website

On 25 August, Cover said it found traces of unauthorized access on the hololive OFFICIAL CARD GAME website after a vulnerability in the CMS it uses was disclosed on 17 July. Names, emails, phone numbers and messages of people who used the contact form from 4 to 19 July were stored temporarily and may have been taken. No tampering with the site was found.

Disclosed

2026-08-25

Organizations involved

1

Leaked or at risk

Unknown

Downtime

Unknown

Timeline

  1. Disclosed 2026-08-25
  2. 1 days

Attack or cause

Method
[Web app exploit]
Impact
[Data leak]
Entry point
Web app

Data exposed or at risk

[Name][E-mail address][Phone number]

Services hit

Organizations involved

Open in organization search

Sources

  1. [1][Official]「hololive OFFICIAL CARD GAME」公式サイトヘの不正アクセスのおそれに関するお知らせCover · 2026-08-25