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.

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.

EPSS: 0.006 (44.8th percentile) — read the EPSS interpretation.

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.

Affected products

Nextcloud Server — versions All versions before 9.0.55 and 10.0.2
Nextcloud Nextcloud_server — versions 10.0.2

Weakness classification (CWE)

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

support@hackerone.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
support@hackerone.com (Third Party Advisory, x_refsource_MISC)

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.