NextcloudGHSA-XWXX-2752-W3XMUsers can delete external storage mount points
7.7 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
21.9%
Description
Impact
A malicious user could delete any personal or global external storage, making them inaccessible for everyone else as well.
Patches
It is recommended that the Nextcloud Server is upgraded to 25.0.9, 26.0.4 or 27.0.1
It is recommended that the Nextcloud Enterprise Server is upgraded to 19.0.13.10, 20.0.14.15, 21.0.9.13, 22.2.10.14, 23.0.12.9, 24.0.12.5, 25.0.9, 26.0.4 or 27.0.1
Workarounds
- Disable app files_external - Also makes the external storage inaccessible but retains the configurations until a patched version has been deployed
References
For more information
If you have any questions or comments about this advisory:
- Create a post in nextcloud/security-advisories
- Customers: Open a support ticket at portal.nextcloud.com
Related
7.7 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
21.9%