UBUNTU-CVE-2020-35475

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    UBUNTU-CVE-2020-35475

    Published: 18 Dec 2020Last Modified: 17 Oct 2026
    Upstream:
    CVE-2020-35475

    Summary:

    Details: In MediaWiki before 1.35.1, the messages userrights-expiry-current and userrights-expiry-none can contain raw HTML. XSS can happen when a user visits Special:UserRights but does not have rights to change all userrights, and the table on the left side has unchangeable groups in it. (The right column with the changeable groups is not affected and is escaped correctly.)

    References: https://ubuntu.com/security/CVE-2020-35475, https://phabricator.wikimedia.org/T268917, 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-2020-35475

    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-2020-35475 | CVE-DB