UBUNTU-CVE-2021-42097

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    UBUNTU-CVE-2021-42097

    Published: 21 Oct 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-42097

    Summary:

    Details: GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a single user account. An attacker can obtain a value within the context of an unprivileged user account, and then use that value in a CSRF attack against an admin (e.g., for account takeover).

    References: https://ubuntu.com/security/CVE-2021-42097, https://mail.python.org/archives/list/[email protected]/thread/IKCO6JU755AP5G5TKMBJL6IEZQTTNPDQ/, https://www.openwall.com/lists/oss-security/2021/10/21/4, https://ubuntu.com/security/notices/USN-5121-1, https://ubuntu.com/security/notices/USN-5121-2, https://www.cve.org/CVERecord?id=CVE-2021-42097

    Affected packages

    Package

    Name: mailman

    Purl: pkg:deb/ubuntu/mailman@1:2.1.20-1ubuntu0.6+esm1?arch=source&distro=esm-infra/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:2.1.20-1ubuntu0.6+esm1

    Affected versions

    1:2.1.20-1
    1:2.1.20-1ubuntu0.1
    1:2.1.20-1ubuntu0.3
    1:2.1.20-1ubuntu0.4
    1:2.1.20-1ubuntu0.5
    1:2.1.20-1ubuntu0.6

    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