CVSS 3.1
5.3 mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NCVE-2021-41239
Medium (5.3) in nextcloud nextcloud server. EPSS 1.2% chance of exploitation in the next 30 days.
Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. There are no known workarounds.
Severity
- EPSS
- 1.2% chance of exploitation in the next 30 days; higher than 69% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-862, CWE-200
- Published
- Modified
- Record from
- the NVD, synced
Affected
- nextcloud:nextcloud_server
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g722-cm3h-8wrx
- https://github.com/nextcloud/server/issues/27122
- https://github.com/nextcloud/server/pull/29260
- https://security.gentoo.org/glsa/202208-17
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-g722-cm3h-8wrx