UBUNTU-CVE-2021-40906

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    UBUNTU-CVE-2021-40906

    Published: 25 Mar 2022Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-40906
    Aliases:
    USN-5527-1

    Summary:

    Details: 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.

    References: https://ubuntu.com/security/CVE-2021-40906, https://checkmk.com/werk/13192, https://github.com/Edgarloyola/CVE-2021-40906, https://ubuntu.com/security/notices/USN-5527-1, https://www.cve.org/CVERecord?id=CVE-2021-40906

    Affected packages

    Package

    Name: check-mk

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.2.8p16-1ubuntu0.2

    Affected versions

    1.2.8p16-1ubuntu0.1

    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
    UBUNTU-CVE-2021-40906 | CVE-DB