Auth bypass in Nextcloud Server
CVE-2020-8139
A missing access control check in Nextcloud Server < 18.0.1, < 17.0.4, and < 16.0.9 causes hide-download shares to be downloadable when appending /download to the URL.
EPSS: 0.015 (72.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Nextcloud Nextcloud_server
- Fedoraproject Fedora — versions 32
- N/a Nextcloud Server — versions Fixed in 18.0.1, 17.0.4, and 16.0.9
Weakness classification (CWE)
References
- support@hackerone.com (Permissions Required, x_refsource_MISC)
- support@hackerone.com (x_refsource_CONFIRM, Vendor Advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2020-8139?
- CVE-2020-8139 is a medium-severity vulnerability in Nextcloud Server, classified under Improper Access Control. CVSS score: 6.5/10. Published 2020-03-20.
- How severe is CVE-2020-8139?
- Medium severity. CVSS v3 base score is 6.5 out of 10.