What is CVE-2020-8119?

CVE-2020-8119 is a medium-severity vulnerability in Nextcloud Server, classified under Improper Authorization. CVSS score: 4.3/10. Published 2020-02-04.

How severe is CVE-2020-8119?

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

Auth bypass in Nextcloud Server

CVE-2020-8119

Improper authorization in Nextcloud server 17.0.0 causes leaking of previews and files when a file-drop share link is opened via the gallery app.

Published 2020-02-04 · 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:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.6th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.6% 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
Nextcloud Server — versions 17.0.0

Weakness classification (CWE)

References

hackerone.com/reports/719426 (Third Party Advisory)
nextcloud.com/security/advisory/ (Vendor Advisory)
lists.opensuse.org/opensuse-security-announce/2020-02/msg00019.html (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2020-02/msg00022.html (vendor-advisory)

Frequently asked questions

What is CVE-2020-8119?: CVE-2020-8119 is a medium-severity vulnerability in Nextcloud Server, classified under Improper Authorization. CVSS score: 4.3/10. Published 2020-02-04.
How severe is CVE-2020-8119?: Medium severity. CVSS v3 base score is 4.3 out of 10.