Vulnerability Intelligence Report
Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML
CVE-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 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).
CISA KEV
Nuclei Template
SSVC: Active Exploitation
Automatable
CVSS Base Score
9.1
CRITICAL
Exploitability:3.9
Impact Score:5.2
EPSS Probability:95.68%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-290 ↗CWE-290 Authentication Bypass by Spoofing
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Zabbix | Frontend | 5.4.0 - 5.4.8 (affected), 5.4.9 < 5.4.9* (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
CISA KEV
ACTIVE IN CATALOG
Nuclei Template
SCANNER AVAILABLE
EPSS Score
95.683%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Zabbix · Vendor · Latvia |
| Reserved | 2022-01-11T00:00:00 |
| Published | 2022-01-13T15:50:39 |
| Patch Date | 2021-11-22 |
| Last Updated | 2025-10-21T23:15:49 |
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