CVE-2016-9464: 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…

PriorityP422medium4.3CVSS 3.0

AVNACLPRLUINSUCNILAN

EPSS

1.62%

73.2th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
nextcloud	nextcloud_server	< 9.0.54	9.0.54
nextcloud	nextcloud_server	—	—

CVSS provenance

nvdv3.04.3MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

nvdv2.04.0MEDIUMAV:N/AC:L/Au:S/C:N/I:P/A:N

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