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Bug bounty program

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

Subdomains of Nextcloud
NameScopeFirst seen
csit.ltd4.nextcloud.comNot in the scope2026-11-14
ctrd.ltd4.nextcloud.comNot in the scope2026-11-14
curiaglobal.ltd4.nextcloud.comNot in the scope2026-11-14
dal.ltd4.nextcloud.comNot in the scope2026-11-14
datagroup-se.ltd4.nextcloud.comNot in the scope2026-11-14
datagroupse.ltd4.nextcloud.comNot in the scope2026-11-14
debeka.ltd4.nextcloud.comNot in the scope2026-11-14
deckbenchmark2.ltd4.nextcloud.comNot in the scope2026-11-14
defineyourlifeacademy.ltd4.nextcloud.comNot in the scope2026-11-14
demoangelo.ltd4.nextcloud.comNot in the scope2026-11-14
desclics.ltd4.nextcloud.comNot in the scope2026-11-14
desktopteam.ltd4.nextcloud.comNot in the scope2026-11-14
deutschesjugendherbergswerk.ltd4.nextcloud.comNot in the scope2026-11-14
devoteam.ltd4.nextcloud.comNot in the scope2026-11-14
dgfmuskel.ltd4.nextcloud.comNot in the scope2026-11-14
diakoniewerkduisburg.ltd4.nextcloud.comNot in the scope2026-11-14
diakoniewert.ltd4.nextcloud.comNot in the scope2026-11-14
dieinnovationskasse.ltd4.nextcloud.comNot in the scope2026-11-14
docker.ltd4.nextcloud.comtoolsNot in the scope2026-11-14
dreessommer.ltd4.nextcloud.comNot in the scope2026-11-14
dufaa.ltd4.nextcloud.comNot in the scope2026-11-14
dunetrails.ltd4.nextcloud.comNot in the scope2026-11-14
dvv.ltd4.nextcloud.comNot in the scope2026-11-14
dynaflow-demo.ltd4.nextcloud.comtestNot in the scope2026-11-14
dynamiktechnologies.ltd4.nextcloud.comNot in the scope2026-11-14
e2e.ltd4.nextcloud.comNot in the scope2026-11-14
e2eecalls.ltd4.nextcloud.comNot in the scope2026-11-14
ecotel.ltd4.nextcloud.comNot in the scope2026-11-14
edo.ltd4.nextcloud.comNot in the scope2026-11-14
edpb.ltd4.nextcloud.comNot in the scope2026-11-14
egov.ltd4.nextcloud.comNot in the scope2026-11-14
elikdiaz.ltd4.nextcloud.comNot in the scope2026-11-14
enchacloud.ltd4.nextcloud.comNot in the scope2026-11-14
enctest.ltd4.nextcloud.comNot in the scope2026-11-14
energisa.ltd4.nextcloud.comNot in the scope2026-11-14
enhedslisten.ltd4.nextcloud.comNot in the scope2026-11-14
epfl.ltd4.nextcloud.comNot in the scope2026-11-14
erics.ltd4.nextcloud.comNot in the scope2026-11-14
erknerholding.ltd4.nextcloud.comNot in the scope2026-11-14
erzdioezesefreiburg.ltd4.nextcloud.comNot in the scope2026-11-14
esa.ltd4.nextcloud.comNot in the scope2026-11-14
esanetherlands.ltd4.nextcloud.comNot in the scope2026-11-14
euro-caps.ltd4.nextcloud.comNot in the scope2026-11-14
ewenetz.ltd4.nextcloud.comNot in the scope2026-11-14
fbfinanzen.ltd4.nextcloud.comNot in the scope2026-11-14
fft.ltd4.nextcloud.comNot in the scope2026-11-14
fipros.ltd4.nextcloud.comNot in the scope2026-11-14
firsttech.ltd4.nextcloud.comNot in the scope2026-11-14
fog-global.ltd4.nextcloud.comNot in the scope2026-11-14
formulatrix.ltd4.nextcloud.comNot in the scope2026-11-14
foss-it.ltd4.nextcloud.comNot in the scope2026-11-14
friedrichshafen.ltd4.nextcloud.comNot in the scope2026-11-14
gdws.ltd4.nextcloud.comNot in the scope2026-11-14
geopartner.ltd4.nextcloud.comNot in the scope2026-11-14
gov.ltd4.nextcloud.comNot in the scope2026-11-14
greenuniversity.ltd4.nextcloud.comNot in the scope2026-11-14
gsdtech.ltd4.nextcloud.comNot in the scope2026-11-14
gssw.ltd4.nextcloud.comNot in the scope2026-11-14
guest.ltd4.nextcloud.comNot in the scope2026-11-14
gvs.ltd4.nextcloud.comNot in the scope2026-11-14
hansatostest.ltd4.nextcloud.comNot in the scope2026-11-14
heliographholding.ltd4.nextcloud.comNot in the scope2026-11-14
herdecke.ltd4.nextcloud.comNot in the scope2026-11-14
hg.ltd4.nextcloud.comNot in the scope2026-11-14
hil.ltd4.nextcloud.comNot in the scope2026-11-14
horizlawae.ltd4.nextcloud.comNot in the scope2026-11-14
htw.ltd4.nextcloud.comNot in the scope2026-11-14
hyundaimotor.ltd4.nextcloud.comNot in the scope2026-11-14
hz-university.ltd4.nextcloud.comNot in the scope2026-11-14
iblce.ltd4.nextcloud.comNot in the scope2026-11-14
icc.ltd4.nextcloud.comNot in the scope2026-11-14
ict-specialist.ltd4.nextcloud.comNot in the scope2026-11-14
imo.ltd4.nextcloud.comNot in the scope2026-11-14
incase.ltd4.nextcloud.comNot in the scope2026-11-14
infodraft-test.ltd4.nextcloud.comtestNot in the scope2026-11-14
innet.ltd4.nextcloud.comNot in the scope2026-11-14
ipulsech.ltd4.nextcloud.comNot in the scope2026-11-14
itegrupal.ltd4.nextcloud.comNot in the scope2026-11-14
itzbund.ltd4.nextcloud.comNot in the scope2026-11-14
janderijkcom.ltd4.nextcloud.comNot in the scope2026-11-14
jarven.ltd4.nextcloud.comNot in the scope2026-11-14
jasar.ltd4.nextcloud.comNot in the scope2026-11-14
kaiser.ltd4.nextcloud.comNot in the scope2026-11-14
kazteleport.ltd4.nextcloud.comNot in the scope2026-11-14
kempel.ltd4.nextcloud.comNot in the scope2026-11-14
kmcsolutions.ltd4.nextcloud.comNot in the scope2026-11-14
kreisbergstrasse.ltd4.nextcloud.comNot in the scope2026-11-14
kudelskisecurity.ltd4.nextcloud.comNot in the scope2026-11-14
kyos.ltd4.nextcloud.comNot in the scope2026-11-14
landkreisvechta.ltd4.nextcloud.comNot in the scope2026-11-14
laufen.ltd4.nextcloud.comNot in the scope2026-11-14
leadventures.ltd4.nextcloud.comNot in the scope2026-11-14
leibnitzinstitutneurobiologie.ltd4.nextcloud.comNot in the scope2026-11-14
leonhardweiss.ltd4.nextcloud.comNot in the scope2026-11-14
leopoldina.ltd4.nextcloud.comNot in the scope2026-11-14
machereynagel.ltd4.nextcloud.comNot in the scope2026-11-14
mail.ltd4.nextcloud.commailNot in the scope2026-11-14
mail2.ltd4.nextcloud.commailNot in the scope2026-11-14
matricia.ltd4.nextcloud.comNot in the scope2026-11-14
mbod-07.ltd4.nextcloud.comNot 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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