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    CVE-2023-31211

    Insufficient authentication flow in Checkmk before 2.2.0p18, 2.1.0p38 and 2.0.0p39 allows attacker to use locked credentials

    Published:Jan 12, 2024
    Last Modified:Jun 17, 2025
    EPS:Jan 12, 2024
    EPSS Score:0.00122
    CVSS Score:8.8

    Affected Products

    Vendor
    Checkmk
    Product
    Checkmk
    Vendor
    Tribe29
    Product
    Checkmk

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-90 Reflection Attack in Authentication Protocol

    Related CVEs

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    CVE-2026-15576 (CVSS 6.9) — Improper authentication in the agent receiver of Checkmk <2.5.0p10 allows an unauthenticated remote attacker t…
    CVE-2026-7485 (CVSS 2.3) — Incorrect authorization in frozen BI aggregations in Checkmk <2.5.0p2, <2.4.0p29, <2.3.0p47, and all 2.2.0 ver…
    CVE-2026-15227 (CVSS 5.3) — Missing authorization in Checkmk <2.5.0p10, <2.4.0p35, <2.3.0p49, and 2.2.0 (EOL) allows an authenticated user…
    CVE-2026-8593 (CVSS 5.3) — Improper permission enforcement in Checkmk versions 2.5.0 before 2.5.0p9, 2.4.0 before 2.4.0p34, 2.3.0 before …
    CVE-2026-14852 (CVSS 5.2) — Privilege escalation in Checkmk versions 2.5.0 before 2.5.0p9, 2.4.0 before 2.4.0p34, 2.3.0 before 2.3.0p49, a…
    CVE-2026-9549 (CVSS 4.8) — Stored cross-site scripting in the service discovery active check output in Checkmk <2.5.0p5, <2.4.0p31, <2.3.…
    CVE-2026-8833 (CVSS 8.5) — Improper neutralization of HTML-encoded characters in the URL validation function in Checkmk <2.5.0p5, <2.4.0p…
    CVE-2026-8078 (CVSS 4.8) — Stored cross-site scripting in the global settings change log in Checkmk <2.5.0p5, <2.4.0p31, <2.3.0p48, and a…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High