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 (5)
Core 5
Core References
Issue Tracking, Third Party Advisory x_refsource_misc
https://hackerone.com/reports/1061591
Broken Link, Vendor Advisory x_refsource_misc
https://nextcloud.com/security/advisory/?id=NC-SA-2021-004
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://github.com/nextcloud/server/issues/24600
Patch, Third Party Advisory x_refsource_misc
https://github.com/nextcloud/server/pull/25224
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/
Scores
CVSS v3
6.5
EPSS
0.0028
EPSS Percentile
51.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Details
CWE
CWE-284
CWE-862
Status
published
Products (2)
fedoraproject/fedora
34
nextcloud/nextcloud_server
< 20.0.6
Published
Mar 03, 2021
Tracked Since
Feb 18, 2026