Permission Increase on Re-sharing via OCS API in Nextcloud Server

CVE-2017-0883 · MEDIUM Severity

AV:N/AC:L/AU:S/C:P/I:P/A:N

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a permission increase on re-sharing via OCS API issue. A permission related issue within the OCS sharing API allowed an authenticated adversary to reshare shared files with an increasing permission set. This may allow an attacker to edit files in a share despite having only a 'read' permission set. Note that this only affects folders and files that the adversary has at least read-only permissions for.

Learn more about our Cis Benchmark Audit For Server Software.