CVE Feed

    Dashboard / CVE / CVE-2021-40906

    CVE-2021-40906

    CheckMK Raw Edition software (versions 1.5.0 to 1.6.0) does not sanitise the input of a web service parameter that is in an unauthenticated zone. This Reflected XSS allows an attacker to open a backdoor on the device with HTML content and interpreted by the browser (such as JavaScript or other client-side scripts) or to steal the session cookies of a user who has previously authenticated via a man in the middle. Successful exploitation requires access to the web service resource without authentication.

    Published:Mar 25, 2022
    Last Modified:Nov 21, 2024
    EPS:Mar 25, 2022
    EPSS Score:0.00887
    CVSS Score:6.1

    Affected Products

    Vendor
    Checkmk
    Product
    Checkmk
    Vendor
    Tribe29
    Product
    Checkmk

    Exploits

    https://github.com/Edgarloyola/CVE-2021-40906

    Related CVEs

    CVE-2026-15937 (CVSS 5.3) — Improper certificate validation in Checkmk <2.5.0p10 allows a relay and a push agent that share the same UUID …
    CVE-2026-17548 (CVSS 5.3) — Missing authorization in Checkmk <2.5.0p12, <2.4.0p36, <2.3.0p50 and all 2.2.0 versions allows an authenticate…
    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