CVE-2022-23131Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML

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).

9.8 CRITICALEPSS 95.68%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 04:29 UTC

OverviewCVSS details

9.8CRITICALCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Jan 13, 2022
Assigner: Zabbix

Affected

Frontend (Zabbix)

Versions: 5.4.0 - 5.4.8

Exploitation

Public exploit: None listed
CISA KEV: Listed · Feb 22, 2022
KEV due date: Mar 8, 2022
Ransomware use: Unknown
SSVC: Exploitation active · Automatable yes · Impact total

EPSS · FIRST, scored Nov 7

95.68%chance of exploitation in 30 days

Higher than 99.87% of CVEs

CVSS 3.1 · NVD

9.8Critical

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

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

CVSS 3.1 · Zabbix (CNA)

9.1Critical

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

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: None

CVSS 2.0 · NVD

5.1Medium

AV:N/AC:H/Au:N/C:P/I:P/A:P

Attack vector: Network
Attack complexity: High
Authentication: None
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
9.8	CRITICAL	3.1NVD	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.1	CRITICAL	3.1Zabbix (CNA)	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
5.1	MEDIUM	2.0NVD	AV:N/AC:H/Au:N/C:P/I:P/A:P

CISA required action

⚡ Known exploited · remediation due Mar 8, 2022

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Details

CVE ID: CVE-2022-23131
Status: Analyzed
Assigner (CNA): Zabbix
Published: Jan 13, 2022
Last modified: 2026-06-17 04:29 UTC
Weaknesses: CWE-290 · Authentication Bypass by Spoofing

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 11:52 UTC.