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Bug bounty reports15,219

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

Program:Nextcloud
Status:Valid
Clear
Severity
Weakness
Year
Bounty paid1
Access stated:Admin or privileged
Access needed
  • No account0
  • A user account0
  • A privileged role0
  • Admin0
  • Physical or local access0
  • Not clear from the report0
Clear filters5 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Critical broken access control: API-only delegated admin can enumerate all Team Folders and grant access to arbitrary groups#3674940ValidAccess ControlMedium2026-09-17–36
Group admins can remove arbitrary data from "data" directory (including admin data)#508493ValidAccess Control–2019-08-12–32
Admins can change authentication details of user configured external storage#2107934ValidAccess Control–2023-12-21$10031
Group admin can remove user from all his groups via API#199286ValidNo weakness recorded–2017-02-23–10
Tables application does not respect sharing limitations set by admin#3642236ValidAccess ControlMedium2026-10-27–6

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

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