Description
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.
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Remediation
No vendor fix or workaround currently provided.
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Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
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. |
References
History
No history.
Status: PUBLISHED
Assigner: hackerone
Published:
Updated: 2024-08-06T02:50:38.553Z
Reserved: 2016-11-19T00:00:00.000Z
Link: CVE-2016-9464
No data.
Status : Modified
Published: 2017-03-28T02:59:00.997
Modified: 2026-05-13T00:24:29.033
Link: CVE-2016-9464
No data.
OpenCVE Enrichment
No data.
Weaknesses
EUVD