CVE Vulnerability

CVE-2021-41179

Nextcloud is an open-source, self-hosted productivity platform. Prior to Nextcloud Server versions 20.0.13, 21.0.5, and 22.2.0, the Two-Factor Authentication wasn't enforced for pages marked as public. Any page marked as `@PublicPage` could thus be accessed with a valid user session that isn't authenticated. This particularly affects the Nextcloud Talk application, as this could be leveraged to gain access to any private chat channel without going through the Two-Factor flow. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.

4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

6.5 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/nextcloud/server/pull/28725 Patch Third Party Advisory
https://hackerone.com/reports/1322865 Permissions Required
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7hvh-rc6f-px23 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:*
cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:*
cpe:2.3:a:nextcloud:server:*:*:*:*:*:*:*:*
Information

Published : 2021-10-25 10:15

Updated : 2021-10-29 03:06

NVD link : CVE-2021-41179

Mitre link : CVE-2021-41179

Products Affected
No products.
CWE
CWE-304

Missing Critical Step in Authentication