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CVE-2022-23131

Zabbix Frontend Authentication Bypass

9.1 CRITICALActively exploited (CISA KEV)EPSS 95.7%
  1. Published13 Jan 2022
  2. Added to CISA KEV22 Feb 2022
  3. Remediation due8 Mar 2022
Actively exploited (CISA KEV)

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

Added to KEV: 22 Feb 2022Federal remediation due: 8 Mar 2022

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).

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Zabbix≥ 5.4.0 ≤ 5.4.8 · 6.0.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2022-23131 being actively exploited?

Yes. CVE-2022-23131 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 22 Feb 2022.

How severe is CVE-2022-23131?

CVE-2022-23131 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 95.7% probability of exploitation.

Which products are affected by CVE-2022-23131?

Affected products include Zabbix.

How do I fix CVE-2022-23131?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2022-23131 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.