CVE-2021-22877 Information

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.

CVSS Vector

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

Reference

https://github.com/nextcloud/server/issues/24600 https://github.com/nextcloud/server/pull/25224 https://nextcloud.com/security/advisory/?id=NC-SA-2021-004 https://hackerone.com/reports/1061591 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.5