Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group.
Metrics
Affected Vendors & Products
Advisories
Source | ID | Title |
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EUVD-2016-10270 | Nextcloud Server before 9.0.54 and 10.0.0 suffers from an improper authorization check on removing shares. The Sharing Backend as implemented in Nextcloud does differentiate between shares to users and groups. In case of a received group share, users should be able to unshare the file to themselves but not to the whole group. The previous API implementation simply unshared the file to all users in the group. |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.

Status: PUBLISHED
Assigner: hackerone
Published:
Updated: 2024-08-06T02:50:38.553Z
Reserved: 2016-11-19T00:00:00
Link: CVE-2016-9464

No data.

Status : Deferred
Published: 2017-03-28T02:59:00.997
Modified: 2025-04-20T01:37:25.860
Link: CVE-2016-9464

No data.

No data.