CVE-2023-3550

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    CVE-2023-3550

    Published: 25 Sept 2023Last Modified: 12 Aug 2026

    Summary: Stored XSS leads to privilege escalation in MediaWiki v1.40.0

    Details: Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.

    References: https://lists.debian.org/debian-lts-announce/2023/11/msg00027.html, https://lists.fedoraproject.org/archives/list/[email protected]/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/, https://www.mediawiki.org/wiki/MediaWiki/, https://fluidattacks.com/advisories/blondie/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/3xxx/CVE-2023-3550.json, https://nvd.nist.gov/vuln/detail/CVE-2023-3550, https://www.debian.org/security/2023/dsa-5520

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 468dd69d6ee8e84b9ab26d0ee3d52f215faaf0d4
    Fixed -None

    Affected versions

    1.40.0-NA
    1.40.0

    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
    CVE-2023-3550 | CVE-DB