Flashback

Disclosed Feb 12, 201540,256 accountsUnverified

In February 2015, the Swedish forum known as Flashback had sensitive internal data on 40k members published via the tabloid newspaper Aftonbladet . The data was allegedly sold to them via Researchgruppen (The Research Group) who have a history of exposing otherwise anonymous users , primarily those who they believe participate in "troll like" behaviour. The compromised data includes social security numbers, home and email addresses.

What is known

People affected	40,256 (accounts in the leaked data, per Have I Been Pwned)
Disclosed	Feb 12, 2015
Happened	Feb 11, 2015
Attack	Not stated
Data exposed	EmailsGovernment IDsAddresses
Sector	Tech
Status	Unverified: not yet confirmed by an official notice, a filing or the organization
Check your email	Have I Been Pwned

Sources

Aggregatorhaveibeenpwned.com

Have I Been Pwned: Flashback

Notices filed

Accounts in the dataFeb 12, 2015

Have I Been Pwned40,256 people

History of this record

Added2026-09-25

First recordedby backfillSource

First seen 2026-09-25 (Have I Been Pwned). Record counts are as reported. Not legal advice.

Everything about Flashback