Description
Improper permissions preservation in Nextcloud Server 16.0.1 causes sharees to be able to reshare with write permissions when sharing the mount point of a share they received, as a public link.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Nextcloud Server | 16.0.2 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP1 | nextcloud | 15.0.14-bp151.3.3.1 | openSUSE-SU-2020:0229-1, openSUSE-SU-2020:0220-1 |
| SUSE Package Hub 15 | nextcloud | 15.0.14-bp151.3.3.1 | openSUSE-SU-2020:0220-1 |
| SUSE Package Hub 12 | nextcloud | 15.0.14-bp151.3.3.1 | openSUSE-SU-2020:0220-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.1 | nextcloud | 15.0.14-bp151.3.3.1 | openSUSE-SU-2020:0220-1 |
Advisories 2
- openSUSE-SU-2020:0220-1 Security update for nextcloud SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0229-1 Security update for nextcloud SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://hackerone.com/reports/619484
- https://nextcloud.com/security/advisory/?id=NC-SA-2020-012
- openSUSE-SU-2020:0220 vendor-advisory
- openSUSE-SU-2020:0229 vendor-advisory