CVE-2017-0883
A permission related issue within the OCS sharing API allowed an authenticated adversary to reshare shared files with an increasing permission set.
Does this matter?
Lower severity and a low EPSS score (0.59%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.0
- 6.4 MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- EPSS
- 0.59% probability · 48th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-275, CWE-732
- Affected
- nextcloud/nextcloud server
- Source
- support@hackerone.com
EPSS 0.6% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://hackerone.com/reports/169680Third Party Advisory
- https://nextcloud.com/security/advisory/?id=nc-sa-2017-001Patch, Vendor Advisory
- https://hackerone.com/reports/169680Third Party Advisory
- https://nextcloud.com/security/advisory/?id=nc-sa-2017-001Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.