Slack
Disclosed Mar 27, 201511 years agoUnverified
Slack's central user database breached, exposing usernames and password hashes
Slack announced in a blog post that attackers had accessed its user database of usernames, emails and hashed passwords, and it rolled out two-factor authentication in response.
What is known
| People affected | Not stated in the sources we have |
|---|---|
| Disclosed | Mar 27, 2015 |
| Attack | Hacking |
| Data exposed | Credentials and tokens, Emails, Passwords |
| Sector | Tech · US |
| Status | Unverified: not yet confirmed by an official notice, a filing or the organization |
Sources
| Source | |
|---|---|
| Slack gets hacked - rolls out two-factor authentication after user database breach - Naked Securityweb.archive.org · News | News |
Notices filed
| Where | Filed | People |
|---|---|---|
| Researchtotal | Mar 27, 2015 |
History of this record
- 2026-09-25 · added · seed source
First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.