Privilege escalation in Nextcloud Server
CVE-2020-8223
A logic error in Nextcloud Server 19.0.0 caused a privilege escalation allowing malicious users to reshare with higher permissions than they got assigned themselves.
Vulnerability class: Privilege Escalation
EPSS: 0.015 (71.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Nextcloud Nextcloud_server — versions 19.0.0
- Fedoraproject Fedora — versions 32, 33
- N/a Nextcloud Server — versions Fixed in 19.0.1
Weakness classification (CWE)
References
- support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC)
- support@hackerone.com (x_refsource_MISC, Vendor Advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory)
- support@hackerone.com (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2020-8223?
- CVE-2020-8223 is a medium-severity vulnerability in Nextcloud Server, classified under Improper Privilege Management. CVSS score: 6.5/10. Published 2020-10-05.
- How severe is CVE-2020-8223?
- Medium severity. CVSS v3 base score is 6.5 out of 10.