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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:No account
Access needed
  • No account1
  • A user account0
  • A privileged role0
  • Admin0
  • Physical or local access0
  • Not clear from the report0
Technique
Clear filters3 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Unauthenticated Access to some old file thumbnails#145621InformativeAuthentication–2016-06-21–2
Uninstalling Slack for Windows (64-bit), then reinstalling keeps you logged in without authentication#238260ValidAuthentication–2020-11-10$50018
Unauthenticated LFI revealing log informationAnalysed#272578ValidInformation Disclosure–2018-01-26–123

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 (965 analysed so far), which can be wrong. Data as of 2026-11-14.

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