Description
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.011, and 21.0.3, there was a lack of ratelimiting on the public share link mount endpoint. This may have allowed an attacker to enumerate potentially valid share tokens. The issue was fixed in versions 19.0.13, 20.0.11, and 21.0.3. There are no known workarounds.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| nextcloud | security-advisories | < 19.0.13, >= 20.0.0, < 20.0.11, >= 21.0.0, < 21.0.3 | — |
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 SP3 | nextcloud | 20.0.11-bp153.2.3.1 | openSUSE-SU-2021:1068-1 |
| SUSE Package Hub 15 SP2 | nextcloud | 20.0.11-bp153.2.3.1 | openSUSE-SU-2021:1068-1 |
| SUSE Package Hub 15 SP1 | nextcloud | 20.0.11-bp153.2.3.1 | openSUSE-SU-2021:1068-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 12 | nextcloud | 20.0.11-bp153.2.3.1 | openSUSE-SU-2021:1068-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | nextcloud | 20.0.11-bp153.2.3.1 | openSUSE-SU-2021:1068-1 |
| openSUSE Leap 15.2 | nextcloud | 20.0.11-bp153.2.3.1 | openSUSE-SU-2021:1068-1 |
Advisories 1
- openSUSE-SU-2021:1068-1 Security update for nextcloud SUSE / openSUSE Security Updates · Feb 4, 2026