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Bug bounty reports15,219

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

Program:Nextcloud
Status
Severity:High
Clear
Weakness
Year
Bounty paid2
Access stated
  • No account0
  • A user account0
  • Admin or privileged0
Access needed:No account
Technique
Clear filters5 of 15,219 reports
Disclosed bug bounty reports
ReportStatusWeaknessSeverityDisclosedBountyVotes
Password reset endpoint is not brute force protectedAnalysed#1987062ValidAuthenticationHigh2023-07-21$50046
https://help.nextcloud.com::: Web cache poisoning attackAnalysed#429747ValidNo weakness recordedHigh2020-01-31–25
"Secure View" aka "Hide Download" can be bypassed easilyAnalysed#788257ValidAccess ControlHigh2020-04-10–22
Denial of Service by requesting to reset a passwordAnalysed#812754ValidDenial of ServiceHigh2021-01-25–20
Virtual Data Room / Hide download on collabora is easy to bypassAnalysed#1194606ValidAccess ControlHigh2021-08-07$15014

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.