CVE-2022-23131
CriticalExploitedPublic exploitIn the case of instances where the SAML SSO authentication is enabled (non-default), session data can be modified by a malicious actor, because a user login stored in the session was not verified.
Published Feb 24, 2022 · Updated Jul 8, 2026 · Also known as TR-22-0172
Key Facts
Patch immediately- CVE-2022-23131 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Zabbix, Frontend.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 22, 2022. Public exploit code is available.
- EPSS estimates a 96% probability of exploitation in the next 30 days.
- Fixed versions are available, including Zabbix <=5.4.8, Zabbix 5.4.8.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
96%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
In the case of instances where the SAML SSO authentication is enabled (non-default), session data can be modified by a malicious actor, because a user login stored in the session was not verified. Malicious unauthenticated actor may exploit this issue to escalate privileges and gain admin access to Zabbix Frontend. To perform the attack, SAML authentication is required to be enabled and the actor has to know the username of Zabbix user (or use the guest account, which is disabled by default).
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Feb 22, 2022 | Mar 8, 2022 | Not reported |
| Industry KEV feed | Feb 22, 2022 | Mar 8, 2022 | Not reported |
| CIRCL KEV | Feb 22, 2022 | Mar 8, 2022 | Not reported |
| ENISA EUVD | Feb 22, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
8 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ZabbixZabbix | 6.0.0-alpha1 | 5.4.8 |
| Frontend | >= 5.4.0 - 5.4.8 | n/a |
Patched Releases
Zabbix
<=5.4.8
Timeline
Added to CISA KEV
Feb 22, 2022
Added to Industry KEV feed
Feb 22, 2022
Added to CIRCL KEV
Feb 22, 2022
Added to ENISA EUVD
Feb 22, 2022
Publicly disclosed
Feb 24, 2022
Last updated
Jul 8, 2026
Weakness Type
- CWE-290 Authentication Bypass by Spoofing
References
- advisoryhttps://blog.sonarsource.com/zabbix-case-study-of-unsafe-session-storage
- advisoryhttps://latesthackingnews.com/
- advisoryhttps://latesthackingnews.com/2022/02/23/multiple-vulnerabilities-found-in-zabbix-it-monitoring-platform/
- advisoryhttps://www.itsecuritynews.info/multiple-vulnerabilities-found-in-zabbix-it-monitoring-platform/
- advisoryhttps://www.securityweek.com/cisas-must-patch-list-puts-spotlight-vulnerability-management-processes
FAQ
Common Questions.
In the case of instances where the SAML SSO authentication is enabled (non-default), session data can be modified by a malicious actor, because a user login stored in the session was not verified.
Affected: Zabbix versions 6.0.0-alpha1; Frontend versions >= 5.4.0 - 5.4.8. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Feb 22, 2022.
Yes. It was added on Feb 22, 2022 with a federal remediation due date of Mar 8, 2022.
Public exploit code is available.
Fixed versions are available, including Zabbix <=5.4.8, Zabbix 5.4.8.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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