6.4
CVSSv2

CVE-2021-32654

Published: 01/06/2021 Updated: 26/10/2022
CVSS v2 Base Score: 6.4 | Impact Score: 4.9 | Exploitability Score: 10
CVSS v3 Base Score: 9.1 | Impact Score: 5.2 | Exploitability Score: 3.9
VMScore: 570
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N

Vulnerability Summary

Nextcloud Server is a Nextcloud package that handles data storage. In versions before 19.0.11, 20.0.10, and 21.0.2, an attacker is able to receive write/read privileges on any Federated File Share. Since public links can be added as federated file share, this can also be exploited on any public link. Users can upgrade to patched versions (19.0.11, 20.0.10 or 21.0.2) or, as a workaround, disable federated file sharing.

Vulnerability Trend

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nextcloud nextcloud server

Vendor Advisories

A security issue has been found in Nextcloud Server before version 2102 An attacker is able to receive write/read privileges on any Federated File Share Since public links can be added as federated file share, this can also be exploited on any public link (eg to add malicious data into a folder, or get read access to a "Files Drop" link) ...