Description
In Znuny LTS before 6.5.21 and Znuny before 7.3.3, XSS can occur via stored user preferences.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Znuny | Znuny | 6.0.0 – < 6.5.21, 7.0.0 – < 7.3.3 | 6.5.21 |
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 | znuny | 6.5.21-1 | — |
| Debian 13 | znuny | No fix yet | — |
| Debian 12 | znuny | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | znuny | No fix yet | — |
| Ubuntu 26.04 LTS | znuny | No fix yet | — |
| Ubuntu 25.10 | znuny | No fix yet | — |
| Ubuntu 24.04 LTS | znuny | No fix yet | — |
| Ubuntu 22.04 LTS | otrs2 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | otrs2 | No fix yet | — |
| Ubuntu 18.04 LTS | otrs2 | No fix yet | — |
| Ubuntu 16.04 LTS | otrs2 | No fix yet | — |
Advisories 1
- WID-SEC-2026-1717 Znuny: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 7, 2026