What’s Vulnerable › Vulnerabilities

CVE-2022-23131: Zabbix Frontend Authentication Bypass Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-02-22
• EPSS: 95.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-01-13 · updated 2026-06-17
• Weakness: CWE-290

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).

Affected products

• Zabbix: from 5.4.0 through 5.4.8; 6.0.0-alpha1

References

• https://support.zabbix.com/browse/ZBX-20350
• https://support.zabbix.com/browse/ZBX-20350
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-23131

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