UBUNTU-CVE-2020-35480

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    UBUNTU-CVE-2020-35480

    Published: 18 Dec 2020Last Modified: 17 Oct 2026
    Upstream:
    CVE-2020-35480

    Summary:

    Details: An issue was discovered in MediaWiki before 1.35.1. Missing users (accounts that don't exist) and hidden users (accounts that have been explicitly hidden due to being abusive, or similar) that the viewer cannot see are handled differently, exposing sensitive information about the hidden status to unprivileged viewers. This exists on various code paths.

    References: https://ubuntu.com/security/CVE-2020-35480, https://phabricator.wikimedia.org/T120883, https://lists.wikimedia.org/pipermail/wikitech-l/2020-December/094126.html, https://lists.wikimedia.org/pipermail/mediawiki-announce/2020-December/000268.html, https://www.cve.org/CVERecord?id=CVE-2020-35480

    Affected packages

    Package

    Name: mediawiki

    Purl: pkg:deb/ubuntu/mediawiki?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1:1.27.3-1
    1:1.27.4-1
    1:1.27.4-2
    1:1.27.4-3

    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-2020-35480 | CVE-DB