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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 file#258084Information Disclosure2020-03-01–154
Attacker can obtain write access to any federated share/public link#1170024Authentication2021-06-10$4,000142
Missing ownership check on remote wipe endpoint#819807Insecure Direct Object Reference2020-04-19$500141
Remote Code Execution via Extract App Plugin#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
manticore-holdings.ltd2.nextcloud.comNot in the scope2026-11-14
marcelw.ltd2.nextcloud.comNot in the scope2026-11-14
martinschule-greifswald.ltd2.nextcloud.comNot in the scope2026-11-14
mauritius-telecom.ltd2.nextcloud.comNot in the scope2026-11-14
mbo-digitaal.ltd2.nextcloud.comNot in the scope2026-11-14
mbod-01.ltd2.nextcloud.comNot in the scope2026-11-14
mbod-03.ltd2.nextcloud.comNot in the scope2026-11-14
mbod-09.ltd2.nextcloud.comNot in the scope2026-11-14
mbod-12.ltd2.nextcloud.comNot in the scope2026-11-14
mbod-16.ltd2.nextcloud.comNot in the scope2026-11-14
mbod-20.ltd2.nextcloud.comNot in the scope2026-11-14
mbod-24.ltd2.nextcloud.comNot in the scope2026-11-14
mc30.ltd2.nextcloud.comNot in the scope2026-11-14
mcdonalds.ltd2.nextcloud.comNot in the scope2026-11-14
mcgill.ltd2.nextcloud.comNot in the scope2026-11-14
mdm.ltd2.nextcloud.comNot in the scope2026-11-14
mdts.ltd2.nextcloud.comNot in the scope2026-11-14
meco.ltd2.nextcloud.comNot in the scope2026-11-14
medgen.ltd2.nextcloud.comNot in the scope2026-11-14
media.ltd2.nextcloud.comNot in the scope2026-11-14
menlo-systems.ltd2.nextcloud.comNot in the scope2026-11-14
mey-maschinenbau.ltd2.nextcloud.comNot in the scope2026-11-14
michelin.ltd2.nextcloud.comNot in the scope2026-11-14
middlesexsheriff.ltd2.nextcloud.comNot in the scope2026-11-14
millenium.ltd2.nextcloud.comNot in the scope2026-11-14
millennium-enterprise.ltd2.nextcloud.comNot in the scope2026-11-14
minienw.ltd2.nextcloud.comNot in the scope2026-11-14
mkk.ltd2.nextcloud.comNot in the scope2026-11-14
mohom.ltd2.nextcloud.comNot in the scope2026-11-14
morohub.ltd2.nextcloud.comNot in the scope2026-11-14
mosal.ltd2.nextcloud.comNot in the scope2026-11-14
mped.ltd2.nextcloud.comNot in the scope2026-11-14
msa.ltd2.nextcloud.comNot in the scope2026-11-14
msb-nrw.ltd2.nextcloud.comNot in the scope2026-11-14
mscloud.ltd2.nextcloud.comNot in the scope2026-11-14
msg-group.ltd2.nextcloud.comNot in the scope2026-11-14
jm.mv.ltd2.nextcloud.comNot in the scope2026-11-14
mzh.ltd2.nextcloud.comNot in the scope2026-11-14
nak.ltd2.nextcloud.comNot in the scope2026-11-14
nato.ltd2.nextcloud.comNot in the scope2026-11-14
nazaha.ltd2.nextcloud.comNot in the scope2026-11-14
ncsc.ltd2.nextcloud.comNot in the scope2026-11-14
netic.ltd2.nextcloud.comNot in the scope2026-11-14
nexeno.ltd2.nextcloud.comNot in the scope2026-11-14
nhmutual.ltd2.nextcloud.comNot in the scope2026-11-14
nist.ltd2.nextcloud.comNot in the scope2026-11-14
computas.norway.ltd2.nextcloud.comNot in the scope2026-11-14
notes.ltd2.nextcloud.comNot in the scope2026-11-14
nouvelle-aquitaine.ltd2.nextcloud.comNot in the scope2026-11-14
nubacloud.ltd2.nextcloud.comNot in the scope2026-11-14
nube4.ltd2.nextcloud.comNot in the scope2026-11-14
nuvemacessivel.ltd2.nextcloud.comNot in the scope2026-11-14
nxp.ltd2.nextcloud.comNot in the scope2026-11-14
oceanly.ltd2.nextcloud.comNot in the scope2026-11-14
ooredoooman.ltd2.nextcloud.comNot in the scope2026-11-14
optigrise.ltd2.nextcloud.comNot in the scope2026-11-14
oraclesuisse.ltd2.nextcloud.comNot in the scope2026-11-14
pca-cpa.ltd2.nextcloud.comNot in the scope2026-11-14
pedro-collabora.ltd2.nextcloud.comNot in the scope2026-11-14
plato.ltd2.nextcloud.comNot in the scope2026-11-14
ps-tt.ltd2.nextcloud.comNot in the scope2026-11-14
psionic.ltd2.nextcloud.comNot in the scope2026-11-14
pss.ltd2.nextcloud.comNot in the scope2026-11-14
ciimarup.pt.ltd2.nextcloud.comNot in the scope2026-11-14
ptptn.ltd2.nextcloud.comNot in the scope2026-11-14
qmulos.ltd2.nextcloud.comNot in the scope2026-11-14
qtsccomvn.ltd2.nextcloud.comNot in the scope2026-11-14
quantum-basel.ltd2.nextcloud.comNot in the scope2026-11-14
quobis.ltd2.nextcloud.comNot in the scope2026-11-14
ranger.ltd2.nextcloud.comNot in the scope2026-11-14
rapperswil.ltd2.nextcloud.comNot in the scope2026-11-14
regiocom.ltd2.nextcloud.comNot in the scope2026-11-14
rello.ltd2.nextcloud.comNot in the scope2026-11-14
rivosys.ltd2.nextcloud.comNot in the scope2026-11-14
rottenburg.ltd2.nextcloud.comNot in the scope2026-11-14
sakuk.ltd2.nextcloud.comNot in the scope2026-11-14
sarabelinformatika.ltd2.nextcloud.comNot in the scope2026-11-14
savas.ltd2.nextcloud.comNot in the scope2026-11-14
sbs.ltd2.nextcloud.comNot in the scope2026-11-14
scaleflex.ltd2.nextcloud.comNot in the scope2026-11-14
scanhealthplan.ltd2.nextcloud.comNot in the scope2026-11-14
schmallenberg.ltd2.nextcloud.comNot in the scope2026-11-14
scle.ltd2.nextcloud.comNot in the scope2026-11-14
sdbj.ltd2.nextcloud.comNot in the scope2026-11-14
sebtest123.ltd2.nextcloud.comNot in the scope2026-11-14
sector27.ltd2.nextcloud.comNot in the scope2026-11-14
secureit.ltd2.nextcloud.comNot in the scope2026-11-14
securfox.ltd2.nextcloud.comNot in the scope2026-11-14
sentinel-one.ltd2.nextcloud.comNot in the scope2026-11-14
serena.ltd2.nextcloud.comNot in the scope2026-11-14
she.ltd2.nextcloud.comNot in the scope2026-11-14
shjpolice.ltd2.nextcloud.comNot in the scope2026-11-14
shoffmann.ltd2.nextcloud.comNot in the scope2026-11-14
sigmarectrix.ltd2.nextcloud.comNot in the scope2026-11-14
sinoitait.ltd2.nextcloud.comNot in the scope2026-11-14
siz.ltd2.nextcloud.comNot in the scope2026-11-14
slw.ltd2.nextcloud.comNot in the scope2026-11-14
smartsoft-itar.ltd2.nextcloud.comNot in the scope2026-11-14
smile.ltd2.nextcloud.comNot in the scope2026-11-14
sogeti.ltd2.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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