1. Slack is resetting passwords 4 years after data breach  Fast Company
2. Slack resets user passwords after 2015 data breach  TechCrunch
3. Slack is resetting user passwords in response to a 2015 data breach  Digital Trends
4. Slack resets tens of thousands of passwords following 2015 data breach  Engadget
5. Slack resets hundreds of thousands of passwords following data breach  BetaNews
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