UBUNTU-CVE-2021-39887

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    UBUNTU-CVE-2021-39887

    Published: 5 Oct 2021Last Modified: 24 Oct 2025
    Upstream:
    CVE-2021-39887

    Summary:

    Details: A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.

    References: https://ubuntu.com/security/CVE-2021-39887, https://hackerone.com/reports/1218174, https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json, https://gitlab.com/gitlab-org/gitlab/-/issues/332903, https://www.cve.org/CVERecord?id=CVE-2021-39887

    Affected packages

    Package

    Name: gitlab

    Purl: pkg:deb/ubuntu/[email protected]+dfsg-5?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    8.4.3+dfsg-9
    8.4.3+dfsg-12

    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-2021-39887 | CVE-DB