CVE-2021-41239: 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…

PriorityP426medium5.3CVSS 3.1

AVNACLPRNUINSUCLINAN

EPSS

1.09%

61.2th percentile

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
nextcloud	nextcloud_server	< 20.0.14	20.0.14
nextcloud	nextcloud_server	—	—
nextcloud	nextcloud_server	>= 21.0.0 < 21.0.6	21.0.6
nextcloud	security-advisories	< 20.0.14	20.0.14
nextcloud	security-advisories	—	—
nextcloud	security-advisories	—	—

CVSS provenance

nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

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