Description
The Nextcloud Desktop Client is a tool to synchronize files from a Nextcloud Server with your computer. Versions prior to 3.6.3 are missing sanitisation on qml labels which are used for basic HTML elements such as `strong`, `em` and `head` lines in the UI of the desktop client. The lack of sanitisation may allow for javascript injection. It is recommended that the Nextcloud Desktop Client is upgraded to 3.6.3. There are no known workarounds for this issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| nextcloud | security-advisories | < 3.6.3 | — |
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | nextcloud-desktop | 3.6.4-1 | — |
| Debian 13 | nextcloud-desktop | 3.6.4-1 | — |
| Debian 12 | nextcloud-desktop | 3.6.4-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | nextcloud-desktop | No fix yet | — |
| Ubuntu 20.04 LTS | nextcloud-desktop | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP5 | nextcloud-desktop | 3.8.0-bp155.2.3.1 | openSUSE-SU-2023:0171-1 |
| SUSE Package Hub 15 SP4 | nextcloud-desktop | 3.8.0-bp154.2.3.1 | openSUSE-SU-2023:0090-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | nextcloud-desktop | 3.8.0-bp155.2.3.1 | openSUSE-SU-2023:0171-1 |
| openSUSE Leap 15.4 | nextcloud-desktop | 3.8.0-bp154.2.3.1 | openSUSE-SU-2023:0090-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | nextcloud-client | 3.6.6-r0 | — |
| Alpine v3.23 | nextcloud-client | 3.6.6-r0 | — |
| Alpine v3.22 | nextcloud-client | 3.6.6-r0 | — |
| Alpine v3.21 | nextcloud-client | 3.6.6-r0 | — |
| Alpine v3.20 | nextcloud-client | 3.6.6-r0 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | nextcloud-client | 3.6.6-r0 | — |
| Alpine v3.18 | nextcloud-client | 3.6.6-r0 | — |
Advisories 3
- openSUSE-SU-2023:0090-1 Security update for nextcloud-desktop SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2023:0171-1 Security update for nextcloud-desktop SUSE / openSUSE Security Updates · May 7, 2025
- WID-SEC-2023-0290 Nextcloud: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 5, 2023