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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…

Medium4.3EPSS 1.6%
Published
Updated
Reserved
Assigned by
hackerone

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.

Scores

CVSS scores of CVE-2016-9464, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0Medium4.3CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
EPSS (exploitation in 30 days)
1.6% · top 24% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.

Weakness

Affected products

  • Nextcloud Server Nextcloud Server before 9.0.54 and 10.0.0

    • affected Nextcloud Server Nextcloud Server before 9.0.54 and 10.0.0

References (7)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .