Description
Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, ratelimits are not applied to OCS API responses. This affects any OCS API controller (`OCSController`) using the `@BruteForceProtection` annotation. Risk depends on the installed applications on the Nextcloud Server, but could range from bypassing authentication ratelimits or spamming other Nextcloud users. The vulnerability is patched in versions 19.0.13, 20.0.11, and 21.0.3. No workarounds aside from upgrading are known to exist.
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