Can reshare read&share only folder with more permissions
Package
Server
(Nextcloud)
Affected versions
>= 26.0.0
>= 27.0.0
>= 28.0.0
Patched versions
26.0.13
27.1.8
28.0.4
Server
(Nextcloud Enterprise)
>= 23.0.0
>= 24.0.0
>= 25.0.0
>= 26.0.0
>= 27.0.0
>= 28.0.0
23.0.12.17
24.0.12.13
25.0.13.8
26.0.13
27.1.8
28.0.4
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
References
For more information
If you have any questions or comments about this advisory: