How severe is CVE-2022-23131?

CVE-2022-23131 has a CVSS score of 9.8/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2022-23131?

Affected package information for CVE-2022-23131 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2022-23131?

No fixed version has been published for CVE-2022-23131 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2022-23131 actively exploited in the wild?

Yes. There are 21 known exploit references for CVE-2022-23131, including 11 in-the-wild exploitations observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2022-23131?

CVE-2022-23131 has an EPSS (Exploit Prediction Scoring System) score of 94.0%, placing it in the 100th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. A score above 50% indicates significantly elevated exploitation risk — immediate patching is strongly recommended.

Is CVE-2022-23131 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2022-23131 (Zabbix Frontend Authentication Bypass Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-02-22. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-03-08. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Is there exploit tooling available for CVE-2022-23131?

A Nuclei detection template exists for CVE-2022-23131, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was CVE-2022-23131 published, and has it been updated?

CVE-2022-23131 was published on January 13, 2022 and was last updated on March 14, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-02-22 — agencies required to remediate by 2022-03-08

CVE-2022-23131

CRITICAL

Published

Jan 13, 2022

Updated

Mar 14, 2026

Affected

0 pkgs

Patched

None yet

Exploits

21 known

EPSS Exploitation Probability

via FIRST.org ↗

94.0%probability of exploitation in next 30 days

Very High Risk100th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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).

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.