Auth bypass in Nextcloud Nextcloud_server
CVE-2021-32654
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as fede…
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.018 (76.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Nextcloud Nextcloud_server
- Nextcloud Security-advisories — versions < 19.0.11, >= 20.0.0, < 20.0.10, >= 21.0.0, < 21.0.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Permissions Required, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
Frequently asked questions
- What is CVE-2021-32654?
- CVE-2021-32654 is a high-severity vulnerability in Nextcloud Nextcloud_server, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2021-06-01.
- How severe is CVE-2021-32654?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2021-32654 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.