{"id":"CVE-2017-0883","aliases":["EUVD-2017-1237","GHSA-g265-v379-5vwj"],"status":"published","title":"Nextcloud Server before 9.0.55 and 10.0.2 suffers from a permission increase on re-sharing via...","description":"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.","severity":{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00593,"percentile":0.48595,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-275","CWE-732"],"published":"2017-04-05T20:00:00Z","modified":"2026-10-24T10:30:21Z","products":[{"vendor":"hackerone","product":"nextcloud server"},{"vendor":"nextcloud","product":"nextcloud server"},{"vendor":"nextcloud","product":"nextcloud_server"}],"references":[{"url":"https://nextcloud.com/security/advisory/?id=nc-sa-2017-001","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix"]},{"url":"https://hackerone.com/reports/169680","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-0883"},{"url":"https://github.com/advisories/GHSA-g265-v379-5vwj"}],"sources":{"cve":[{"id":"CVE-2017-0883","description":"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.","status":"published","published":"2017-04-05T20:00:00Z","modified":"2024-08-05T13:18:06.386Z","cwes":["CWE-275"],"updated_at":"2026-11-02T14:33:22.699876Z"}],"euvd":[{"id":"EUVD-2017-1237","description":"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.","status":"published","published":"2017-04-05T20:00:00Z","modified":"2024-08-05T13:18:06Z","updated_at":"2026-11-03T02:39:22.969866Z"}],"ghsa":[{"id":"GHSA-g265-v379-5vwj","title":"Nextcloud Server before 9.0.55 and 10.0.2 suffers from a permission increase on re-sharing via...","description":"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.","status":"published","published":"2022-05-13T01:38:26Z","modified":"2023-02-01T05:08:56Z","cvss":[{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-732"],"updated_at":"2026-11-02T14:50:53.78471Z"}],"nvd":[{"id":"CVE-2017-0883","description":"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.","status":"published","published":"2017-04-05T20:59:00.197Z","modified":"2026-06-17T00:58:27.587Z","cvss":[{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-275","CWE-732"],"updated_at":"2026-11-02T14:03:44.86906Z"}],"osv":[{"id":"CVE-2017-0883","description":"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.","status":"published","published":"2017-04-05T20:59:00.197Z","modified":"2026-10-24T10:30:21.00448342Z","cvss":[{"version":"3.0","score":6.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:03.472693Z"}]}}