What is CVE-2017-0884?

CVE-2017-0884 is a medium-severity vulnerability in Nextcloud Server, classified under Permission Issues. CVSS score: 4.3/10. Published 2017-04-05.

How severe is CVE-2017-0884?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Nextcloud Server

CVE-2017-0884

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a creation of folders in read-only folders despite lacking permissions issue. Due to a logical error in the file caching layer an authenticated adversary is able to create empty folders inside a shared folder. Note that this only affects folders and files that the adversary has at least read-only permissions for.

Published 2017-04-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (49.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

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

Weakness classification (CWE)

References

nextcloud.com/security/advisory/ (Patch, Broken Link, Vendor Advisory)
hackerone.com/reports/169680 (Third Party Advisory)

Frequently asked questions

What is CVE-2017-0884?: CVE-2017-0884 is a medium-severity vulnerability in Nextcloud Server, classified under Permission Issues. CVSS score: 4.3/10. Published 2017-04-05.
How severe is CVE-2017-0884?: Medium severity. CVSS v3 base score is 4.3 out of 10.