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Bug bounty reports15,219

Publicly disclosed HackerOne reports, with the platform's own outcome and severity.

Program:Slack
Status
Severity
Weakness
Year
Bounty paid1
Access stated
Access needed
  • No account0
  • A user account1
  • A privileged role0
  • Admin0
  • Physical or local access0
  • Not clear from the report0
Technique:Session fixation or reuse
Clear filters1 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Uninstalling Slack for Windows (64-bit), then reinstalling keeps you logged in without authenticationAnalysed#238260ValidAuthenticationLow2020-11-10$50018

Status and severity are HackerOne's. “Access stated” is what the title says; “Access needed” and techniques come from CyberSIXT's analysis of the public report, where there is one, which can be wrong. Data as of 2026-11-15.