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Vulnerabilities

Vulnerability · CVE-2022-23131

Zabbix Frontend Authentication Bypass Vulnerability

Published Jan 13, 2022 · catalog updated Jun 16, 2026 · Zabbix Frontend

Patch now

CVE-2022-23131 is in the CISA known-exploited catalog, due Mar 8, 2022. Confirm Zabbix Frontend against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
95.68%
Remediation
Remediation guidance
Affected products
cpe zabbix/zabbix · vendor Zabbix Frontend

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).

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe zabbix/zabbix6.0.0
  • vendor Zabbix Frontendversion unspecified

How to fix CVE-2022-23131

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2022-23131 is in the CISA known-exploited catalog, due Mar 8, 2022. Confirm Zabbix Frontend against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 6.0.0. Apply updates per vendor instructions.

What should an analyst verify?

CWE-290: Authentication Bypass by Spoofing. EPSS 95.68%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 13, 2022 · Catalog

    Detected

    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

  2. Feb 22, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Mar 8, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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

Sources

  • CISA KEVConfirmed exploitationCVE-2022-23131

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

    cisa.gov
  • CVE.orgVulnerability recordCVE-2022-23131

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-23131

    30-day exploitation probability 95.7%

    first.org
  • NIST NVDVulnerability recordCVE-2022-23131

    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 g

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2022-23131

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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.