Is CVE-2022-23131 in the CISA KEV catalog?

Yes. CVE-2022-23131 is on the CISA Known Exploited Vulnerabilities list, added 2022-02-22.

What is the CVSS severity of CVE-2022-23131?

CVE-2022-23131 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2022-23131?

CVE-2022-23131 has an EPSS score of 95.68% (100th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2022-23131?

No published fix for CVE-2022-23131 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2022-03-08. Apply the vendor's mitigations per CISA's guidance.

CVE & CISA-KEV Catalog

CVE-2022-23131

CRITICALCISA KEVEPSS 100th pctl

9.1

CVSS v3

NVD

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).

CWE-290

How to fix

Actively exploited, no published fix found yet

CISA required action: Apply updates per vendor instructions.

Federal remediation due: 2022-03-08

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

95.68%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Zabbix Frontend Authentication Bypass Vulnerability

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

Apply updates per vendor instructions.

Remediation due: 2022-03-08

References

Patch1

support.zabbix.com

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-290 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-4358	Critical	9.8	97%	KEV	-
CVE-2022-24112	Critical	9.8	96%	KEV	Fix
CVE-2021-29441	High	8.6	74%	-	Fix
CVE-2021-31195	Medium	6.5	74%	-	Fix
CVE-2020-7388	Critical	10.0	70%	-	Fix
CVE-2024-54085	Critical	9.8	61%	KEV	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-30.