Vulnerability in Nextcloud Server
CVE-2017-0883
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.006 (46.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Nextcloud Server — versions All versions before 9.0.55 and 10.0.2
- Nextcloud Server — versions 10.0.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- nextcloud.com/security/advisory/ (Patch, Vendor Advisory)
- hackerone.com/reports/169680 (Third Party Advisory)
Frequently asked questions
- What is CVE-2017-0883?
- CVE-2017-0883 is a medium-severity vulnerability in Nextcloud Server, classified under Permission Issues. CVSS score: 6.4/10. Published 2017-04-05.
- How severe is CVE-2017-0883?
- Medium severity. CVSS v3 base score is 6.4 out of 10.
- Is CVE-2017-0883 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.