CVE-2022-23131

Name: CVE-2022-23131
Creator: NVD / NIST
Published: 2022-01-13T16:15:08.053+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 95.68%

Last modified Jun 17, 2026

CVE-2022-23131 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 95.68% chance of exploitation in the next 30 days.

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).

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

95.68%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Mar 8, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Zabbix	Zabbix	>= 5.4.0, <= 5.4.8	—
Zabbix	Zabbix	6.0.0	Alpha1

References

https://support.zabbix.com/browse/ZBX-20350Issue Tracking, Patch, Vendor Advisory
https://support.zabbix.com/browse/ZBX-20350Issue Tracking, Patch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-23131US Government Resource

Timeline

Published: Jan 13, 2022
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2022-23131?

How severe is CVE-2022-23131?

CVE-2022-23131 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 95.68% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2022-23131?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-23131?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST