CVE-2022-23131
CRITICALCISA KEVEPSS 100th pctlDescription
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).
How to fix
Actively exploited, no published fix found yet
CISA required action: Apply updates per vendor instructions.
Federal remediation due: 2022-03-08
Mitigation guidance may be in the linked vendor advisories in the References section below.
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CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Exploit Intelligence
Very high risk: more likely to be exploited than 100% of all known CVEs.
Zabbix Frontend Authentication Bypass Vulnerability
Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML.
Apply updates per vendor instructions.
Remediation due: 2022-03-08
References
Related Vulnerabilities
Other CWE-290 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-4358 | Critical | 9.8 | 97% | KEV | - |
| CVE-2022-24112 | Critical | 9.8 | 96% | KEV | Fix |
| CVE-2019-1234 | High | 7.5 | 74% | - | - |
| CVE-2021-31195 | Medium | 6.5 | 74% | - | Fix |
| CVE-2021-29441 | High | 8.6 | 70% | - | Fix |
| CVE-2020-7388 | Critical | 10.0 | 69% | - | Fix |
Common questions
How do I fix CVE-2022-23131?
No published fix for CVE-2022-23131 has been found yet. It is on the CISA Known Exploited Vulnerabilities list; federal agencies must remediate by 2022-03-08. Apply the vendor's mitigations per CISA's guidance.
Is CVE-2022-23131 being actively exploited?
Yes. CVE-2022-23131 is listed in the CISA Known Exploited Vulnerabilities catalog, which means exploitation has been observed in the wild. US federal agencies were required to remediate it by 2022-03-08. Treat it as a priority whatever its CVSS score says.
How severe is CVE-2022-23131?
CVE-2022-23131 has a CVSS v3 base score of 9.1, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-30.