Skip to content

Bug bounty reports15,219

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

Program:Nextcloud
Status
Severity
Weakness:Access Control
Clear
Year
Bounty paid1
Access stated:Admin or privileged
Access needed
Technique
Clear filters4 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 groupsAnalysed#3674940ValidAccess ControlMedium2026-09-17–36
Group admins can remove arbitrary data from "data" directory (including admin data)Analysed#508493ValidAccess ControlHigh2019-08-12–32
Admins can change authentication details of user configured external storageAnalysed#2107934ValidAccess ControlLow2023-12-21$10031
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, where there is one, which can be wrong. Data as of 2026-11-15.