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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
msclouddemo.ltd3.nextcloud.comNot in the scope2026-11-14
muehlbauer.ltd3.nextcloud.comNot in the scope2026-11-14
mufmuf.ltd3.nextcloud.comNot in the scope2026-11-14
mzoni.ltd3.nextcloud.comNot in the scope2026-11-14
nationaal-dovenfonds.ltd3.nextcloud.comNot in the scope2026-11-14
nato.ltd3.nextcloud.comNot in the scope2026-11-14
netbase.ltd3.nextcloud.comNot in the scope2026-11-14
neteks.ltd3.nextcloud.comNot in the scope2026-11-14
netfixai.ltd3.nextcloud.comNot in the scope2026-11-14
netspeed.ltd3.nextcloud.comNot in the scope2026-11-14
newyorker.ltd3.nextcloud.comNot in the scope2026-11-14
ngo-alle.ltd3.nextcloud.comNot in the scope2026-11-14
nhlstenden.ltd3.nextcloud.comNot in the scope2026-11-14
nikolauspflege.ltd3.nextcloud.comNot in the scope2026-11-14
nscc.ltd3.nextcloud.comNot in the scope2026-11-14
nubacloud.ltd3.nextcloud.comNot in the scope2026-11-14
oberberg-kliniken.ltd3.nextcloud.comNot in the scope2026-11-14
ocg-converge.ltd3.nextcloud.comNot in the scope2026-11-14
odp.ltd3.nextcloud.comNot in the scope2026-11-14
onecomet.ltd3.nextcloud.comNot in the scope2026-11-14
oneskycommunitycom.ltd3.nextcloud.comNot in the scope2026-11-14
openline.ltd3.nextcloud.comNot in the scope2026-11-14
orangesonatelcom.ltd3.nextcloud.comNot in the scope2026-11-14
orbitwork.ltd3.nextcloud.comNot in the scope2026-11-14
orbitz.ltd3.nextcloud.comNot in the scope2026-11-14
order66.ltd3.nextcloud.comNot in the scope2026-11-14
otc.ltd3.nextcloud.comNot in the scope2026-11-14
oxtech.ltd3.nextcloud.comNot in the scope2026-11-14
paramim.ltd3.nextcloud.comNot in the scope2026-11-14
pbw.ltd3.nextcloud.comNot in the scope2026-11-14
pels-rijcken.ltd3.nextcloud.comNot in the scope2026-11-14
pep.ltd3.nextcloud.comNot in the scope2026-11-14
phenotyne.ltd3.nextcloud.comNot in the scope2026-11-14
physter.ltd3.nextcloud.comNot in the scope2026-11-14
pichincha.ltd3.nextcloud.comNot in the scope2026-11-14
polizei-rlp.ltd3.nextcloud.comNot in the scope2026-11-14
prezode.ltd3.nextcloud.comNot in the scope2026-11-14
prianto.ltd3.nextcloud.comNot in the scope2026-11-14
promethean.ltd3.nextcloud.comNot in the scope2026-11-14
proximus.ltd3.nextcloud.comNot in the scope2026-11-14
pva.ltd3.nextcloud.comNot in the scope2026-11-14
qaqualityautomation.ltd3.nextcloud.comNot in the scope2026-11-14
qr.ltd3.nextcloud.comNot in the scope2026-11-14
quadrata-group.ltd3.nextcloud.comNot in the scope2026-11-14
rcitservices.ltd3.nextcloud.comNot in the scope2026-11-14
rechtsanwaltskammer-muenchen.ltd3.nextcloud.comNot in the scope2026-11-14
redefine.ltd3.nextcloud.comNot in the scope2026-11-14
remondis.ltd3.nextcloud.comNot in the scope2026-11-14
rendo-groep.ltd3.nextcloud.comNot in the scope2026-11-14
responder-webworks.ltd3.nextcloud.comNot in the scope2026-11-14
revobyte.ltd3.nextcloud.comNot in the scope2026-11-14
royalstrategic.ltd3.nextcloud.comNot in the scope2026-11-14
rtec.ltd3.nextcloud.comNot in the scope2026-11-14
saaris.ltd3.nextcloud.comNot in the scope2026-11-14
umwelt.saarland.ltd3.nextcloud.comNot in the scope2026-11-14
saxion.ltd3.nextcloud.comNot in the scope2026-11-14
sdd.ltd3.nextcloud.comNot in the scope2026-11-14
seb999.ltd3.nextcloud.comNot in the scope2026-11-14
sebtest.ltd3.nextcloud.comNot in the scope2026-11-14
sebtest2.ltd3.nextcloud.comNot in the scope2026-11-14
securevalley.ltd3.nextcloud.comNot in the scope2026-11-14
servertoday.ltd3.nextcloud.comNot in the scope2026-11-14
servisiram.ltd3.nextcloud.comNot in the scope2026-11-14
sgdsn.ltd3.nextcloud.comNot in the scope2026-11-14
sharing.ltd3.nextcloud.comNot in the scope2026-11-14
si-tek.ltd3.nextcloud.comNot in the scope2026-11-14
sickkidsca.ltd3.nextcloud.comNot in the scope2026-11-14
siscotel.ltd3.nextcloud.comNot in the scope2026-11-14
skyworth.ltd3.nextcloud.comNot in the scope2026-11-14
smile.ltd3.nextcloud.comNot in the scope2026-11-14
smsconstructionltd.ltd3.nextcloud.comNot in the scope2026-11-14
snappmobile.ltd3.nextcloud.comNot in the scope2026-11-14
societenationaledeselecommunicationsdusenegal.ltd3.nextcloud.comNot in the scope2026-11-14
softrain.ltd3.nextcloud.comNot in the scope2026-11-14
softtech.ltd3.nextcloud.comNot in the scope2026-11-14
sogeti.ltd3.nextcloud.comNot in the scope2026-11-14
solidatech.ltd3.nextcloud.comNot in the scope2026-11-14
soprasteria-norway.ltd3.nextcloud.comNot in the scope2026-11-14
squaretec.ltd3.nextcloud.comNot in the scope2026-11-14
srca.ltd3.nextcloud.comNot in the scope2026-11-14
stadgent.ltd3.nextcloud.comNot in the scope2026-11-14
stadtverwaltunggermersheim.ltd3.nextcloud.comNot in the scope2026-11-14
starzplayarabia.ltd3.nextcloud.comNot in the scope2026-11-14
steng.ltd3.nextcloud.comNot in the scope2026-11-14
studentenwerk-dresden.ltd3.nextcloud.comNot in the scope2026-11-14
studentkareniostersund.ltd3.nextcloud.comNot in the scope2026-11-14
subisu.ltd3.nextcloud.comNot in the scope2026-11-14
suedtiroltest.ltd3.nextcloud.comNot in the scope2026-11-14
suedtiroltest2.ltd3.nextcloud.comNot in the scope2026-11-14
suiteit.ltd3.nextcloud.comNot in the scope2026-11-14
swap.ltd3.nextcloud.comNot in the scope2026-11-14
swingactions.ltd3.nextcloud.comNot in the scope2026-11-14
synccom.ltd3.nextcloud.comNot in the scope2026-11-14
syselcloud.ltd3.nextcloud.comNot in the scope2026-11-14
sytexltd.ltd3.nextcloud.comNot in the scope2026-11-14
takamol.ltd3.nextcloud.comNot in the scope2026-11-14
tei.ltd3.nextcloud.comNot in the scope2026-11-14
tekdynamics.ltd3.nextcloud.comNot in the scope2026-11-14
telecomclouduzbekistan.ltd3.nextcloud.comNot in the scope2026-11-14
test.ltd3.nextcloud.comtestNot 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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