NextcloudGHSA-JJM3-J9XH-5XMQCan reshare read&share only folder with more permissions
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
6.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
15.5%
Description
Impact
A recipient of a share with read&share permissions could reshare the item with more permissions.
Patches
It is recommended that the Nextcloud Server is upgraded to 26.0.13 or 27.1.8 or 28.0.4
It is recommended that the Nextcloud Enterprise Server is upgraded to 23.0.12.17 or 24.0.12.13 or 25.0.13.8 or 26.0.13 or 27.1.8 or 28.0.4
Workarounds
- No workaround available
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
8.1 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
6.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
15.5%