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Nextcloud

Open on HackerOneAtlas
Platform
HackerOne
Bounties
Pays
Assets in scope
94
Disclosed reports
613
Subdomains
1,642
Vendor on CyberSIXT
Nextcloud (399 CVEs, 0 exploited)

Most upvoted reports613

All reports
Most upvoted reports of Nextcloud
ReportWeaknessDisclosedBountyVotes
Code injection possible with malformed Nextcloud Talk chat commandsAnalysed#851807Command and Code Injection2020-06-02–317
User can delete data in shared folders he's not autorized to accessAnalysed#642515Access Control2020-04-10–173
Access to all files of remote user through shared fileAnalysed#258084Information Disclosure2020-03-01–154
Attacker can obtain write access to any federated share/public linkAnalysed#1170024Authentication2021-06-10$4,000142
Missing ownership check on remote wipe endpointAnalysed#819807Insecure Direct Object Reference2020-04-19$500141
Remote Code Execution via Extract App PluginAnalysed#546753Command and Code Injection2019-05-30–124
Sensitive Information Disclosure via Back Button Post Logout on https://apps.nextcloud.com/account/#2946927No weakness recorded2025-03-16–113
Mail contact autocomplete bypasses administrator-configured user enumeration restrictions and expose member information outside the intended scope#3617729Information Disclosure2026-09-04$250101
PIN bypass in PassCodeActivity via back button#3625210Authentication2026-06-07$150101
Group restriction bypass via bearer token in user_oidc (SETTING_RESTRICT_LOGIN_TO_GROUPS not enforced in Backend::getCurrentUserId)#3572848Access Control2026-05-21$150100

Subdomains1,642

Root:nextcloud.com
Scope
Name suggests:Staging
First seen
Text fileClear filters9 names
Subdomains of Nextcloud
NameScopeFirst seen
staging.nextcloud.comstagingNot in the scope2026-11-14
tech-preview.nextcloud.comstagingNot in the scope2026-11-14
staging.cloud.nextcloud.comstagingNot in the scope2026-11-14
office-preprod.nextcloud.comstagingNot in the scope2026-11-14
collabora-staging.nextcloud.comstagingNot in the scope2026-11-14
staging.collabora.nextcloud.comstagingNot in the scope2026-11-14
staging.push.cloud.nextcloud.comstagingNot in the scope2026-11-14
eo-staging.services.nextcloud.comstagingNot in the scope2026-11-14
whiteboard.tech-preview.nextcloud.comstagingNot in the scope2026-11-14

23 names are covered by the program's own scope; 0 were first seen this week. Names come from ProjectDiscovery's public Chaos dataset (passive sources: certificate logs, DNS and other public data), matched to the program by its listing and its own domain scope. A name being in a dataset is not permission to test it: only what the program's own scope says is in scope, and its policy decides. CyberSIXT does not resolve, probe or scan these names. Tags come from the name alone. Source: ProjectDiscovery Chaos. Subdomains on the Atlas, or search the subdomains of every program.

A name in a dataset is not permission to test it: the program's own scope and rules decide. Data as of 2026-11-14.

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