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.

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

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

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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.