# CVE-2022-23131: Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML

> CVE-2022-23131: Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML. CVSS 9.1 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2022-23131
Last updated: 2025-10-21T23:15:49Z

- Published: 2022-01-13 15:50 UTC · Updated: 2025-10-21 23:15 UTC · Assigner: Zabbix
- CVSS: 9.1 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS: 95.7%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-02-22, federal due date 2022-03-08, ransomware use: Unknown
- CWE: 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).

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Zabbix: Frontend

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2022-23131)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2022-23131)
- [https://support.zabbix.com/browse/ZBX-20350](https://support.zabbix.com/browse/ZBX-20350)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2022-23131 · Markdown: https://rewindex.com/cve/CVE-2022-23131.md · JSON: https://rewindex.com/api/v1/cves/CVE-2022-23131 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:11:19.947Z