KLab: a mass of requests hit KLab ID, and about 520,000 confirmation emails were sent to the addresses of unspecified non-members

Mass access to the signup confirmation function sent about 520,000 spam emails. No leak was confirmed.

Disclosed

2021-07-23

Organizations involved

Leaked or at risk

Unknown

Downtime

Unknown

What happened

2021-07-21
From around 22:00 until around 00:42 the next day, the signup confirmation function of KLab ID received a mass of requests from outside, and confirmation emails were sent to unspecified addresses. [1]
2021-07-23
It announced the case and said it strengthened the function to prevent a recurrence. [1]

About 520,000 confirmation emails were sent as spam to addresses of non-members. No leak of member information was announced. [1]

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						Note
KLab Inc.	[Breached]	[Moderate]	Tokyo, Minato	Information and communications	Unknown