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ExploitedIn CISA KEVFix available

CVE-2022-23131

Exploitation confirmed. First attested on 2022-02-22 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2022-01-13
  • WeaknessCWE-290

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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).

Timeline

dates in UTC
  1. 2022-01-1316:15CVE publishedNVD
  2. 2022-02-22Added to the CISA KEV catalogCISA KEV
  3. 2022-02-22Listed as exploited by GCVEGCVE
  4. 2022-02-22Exploitation first reportedCISA KEV
  5. 2025-01-2917:20SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-23131?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-23131?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Zabbix
BranchAffectedFixed in
5.4≥ 5.4.0, ≤ 5.4.8no fix published
6.0= 6.0.0no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As Zabbix, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Zabbix Frontend
    Affected
    • = 5.4.0 - 5.4.8no fix stated

    Not affected ≥ 5.4.9, < 5.4.9*

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2022-01-13

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • CVE-2022-23131 Red Hat Product Security

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

Full record on NVD

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-03-08

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
20 repositories, unverifiedjweny/CVE-2022-23131Mr-xn/cve-2022-231311mxml/CVE-2022-23131zwjjustdoit/cve-2022-23131L0ading-x/cve-2022-23131
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-02-22
Patch Due Date
2022-03-08
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-01-13
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-4g73-3mxf-j47w

Frequently asked questions

What is 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).

Is CVE-2022-23131 actively exploited?

Yes. CVE-2022-23131 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-03-08.

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

CVE-2022-23131 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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