CVE-2021-22877

A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.

CVSS v3.0 6.5 MEDIUM
CVSS v2.0 5.5 MEDIUM

6.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

5.5^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:P/A:N

Exploitability : 8.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/nextcloud/server/issues/24600	Exploit Patch Third Party Advisory
https://github.com/nextcloud/server/pull/25224	Patch Third Party Advisory
https://nextcloud.com/security/advisory/?id=NC-SA-2021-004	Vendor Advisory
https://hackerone.com/reports/1061591	Issue Tracking Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:nextcloud:nextcloud:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

Information

Published : 2021-03-03 18:15

Updated : 2022-01-01 18:02

NVD link : CVE-2021-22877

Mitre link : CVE-2021-22877

JSON object : View

Products Affected

fedoraproject

fedora

nextcloud

nextcloud

CWE

CWE-269

Improper Privilege Management

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