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 to Advisories, Solutions, and Tools
References to Advisories, Solutions, and Tools
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Resourcehttps://github.com/nextcloud/server/issues/24600https://github.com/nextcloud/server/pull/25224https://hackerone.com/reports/1061591https://nextcloud.com/security/advisory/?id=NC-SA-2021-004
