What is CVE-2017-0887?

CVE-2017-0887 is a medium-severity vulnerability in Nextcloud Server, classified under CWE-807. CVSS score: 4.3/10. Published 2017-04-05.

How severe is CVE-2017-0887?

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

Improper input validation in Nextcloud Server

CVE-2017-0887

Nextcloud Server before 9.0.55 and 10.0.2 suffers from a bypass in the quota limitation. Due to not properly sanitizing values provided by the `OC-Total-Length` HTTP header an authenticated adversary may be able to exceed their configured user quota. Thus using more space than allowed by the administrator.

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: 0.009 (57.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · 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/173622 (Third Party Advisory)

Frequently asked questions

What is CVE-2017-0887?: CVE-2017-0887 is a medium-severity vulnerability in Nextcloud Server, classified under CWE-807. CVSS score: 4.3/10. Published 2017-04-05.
How severe is CVE-2017-0887?: Medium severity. CVSS v3 base score is 4.3 out of 10.