Vulnerabilities > CVE-2021-22877 - Missing Authorization vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
HIGH Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
NONE Summary
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.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- 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%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/