CVE-2021-22877

medium

Description

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.

References

Advisories
More

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/

https://hackerone.com/reports/1061591

https://github.com/nextcloud/server/pull/25224

https://nextcloud.com/security/advisory/?id=NC-SA-2021-004

https://github.com/nextcloud/server/issues/24600

Details

Source: Mitre, NVD

Published: 2021-03-03

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

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