Description
In Zabbix from 4.0.x before 4.0.28rc1, 5.0.0alpha1 before 5.0.10rc1, 5.2.x before 5.2.6rc1, and 5.4.0alpha1 before 5.4.0beta2, the CControllerAuthenticationUpdate controller lacks a CSRF protection mechanism. The code inside this controller calls diableSIDValidation inside the init() method. An attacker doesn't have to know Zabbix user login credentials, but has to know the correct Zabbix URL and contact information of an existing user with sufficient privileges.
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 | zabbix | 1:5.0.8+dfsg-1 | — |
| Debian 13 | zabbix | 1:5.0.8+dfsg-1 | — |
| Debian 12 | zabbix | 1:5.0.8+dfsg-1 | — |
| Debian 10 | zabbix | 1:4.0.4+dfsg-1+deb10u1 | DLA-3390-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | zabbix | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | zabbix | 4.0.12-4.12.1 | SUSE-SU-2021:0990-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | zabbix | 4.0.12-4.12.1 | SUSE-SU-2021:0990-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | zabbix | 4.0.37-lp153.2.3.1 | openSUSE-SU-2022:0036-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | zabbix | 5.2.6-r0 | — |
| Alpine v3.23 | zabbix | 5.2.6-r0 | — |
| Alpine v3.22 | zabbix | 5.2.6-r0 | — |
| Alpine v3.21 | zabbix | 5.2.6-r0 | — |
| Alpine v3.20 | zabbix | 5.2.6-r0 | — |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | zabbix | 5.2.6-r0 | — |
| Alpine v3.18 | zabbix | 5.2.6-r0 | — |
| Alpine v3.17 | zabbix | 5.2.6-r0 | — |
| Alpine v3.16 | zabbix | 5.2.6-r0 | — |
| Alpine v3.15 | zabbix | 5.2.6-r0 | — |
| Alpine v3.14 | zabbix | 5.2.6-r0 | — |
| Alpine v3.13 | zabbix | 5.2.6-r0 | — |
| Alpine v3.12 | zabbix | 5.0.9-r0 | — |
Advisories 3
- DLA-3390-1 zabbix - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2021:0990-1 Security update for zabbix SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0036-1 Security update for zabbix SUSE / openSUSE Security Updates · Feb 4, 2026