CVEs / CVE-2022-23131
CVE-2022-23131: Zabbix Frontend Authentication Bypass Vulnerability
- Known exploited in the CISA KEV catalog since 22 Feb 2022
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 95.6% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML.
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Zabbix Frontend | 5.4.0 - 5.4.8 | — |
Exploitation
| In CISA KEV since | 22 Feb 2022 |
|---|---|
| Due date for US federal agencies | 8 Mar 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-290 |
References
- CVE-2022-23131 on NVD
- CVE-2022-23131 in the CISA KEV catalog
- CVE-2022-23131 on OSV
- https://support.zabbix.com/browse/ZBX-20350 Issue Tracking, Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-23131 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.