title: User enumeration setting not respected in Nextcloud server
description: 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.
problem types: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
affected:
{
product: security-advisories
vendor: nextcloud
versions:
status: affected, version: < 20.0.14
status: affected, version: >= 21.0.0, < 21.0.6
status: affected, version: >= 22.2.0, < 22.2.1
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 5.3
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
version: 3.1
]