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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2021-41239

CVE-2021-41239

MEDIUM5.3

User enumeration setting not respected in Nextcloud server

Published Mar 8, 2022

Modified 10 months ago

Details

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.

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://www.cve.org/CVERecord?id=CVE-2021-41239

CVSS Analysis

CVSS v3.1

5.3

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

LowC:L

Integrity

NoneI:N

Availability

NoneA:N

5.3/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

Information Disclosure

Information Exposure

Ecosystems

Timeline

PublishedMar 8, 2022

ModifiedApr 23, 2025

CVE-2021-41239 | Mondoo Vulnerability Intelligence