CVE-2023-48303

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    CVE-2023-48303

    Published: 21 Nov 2023Last Modified: 12 Aug 2026

    Summary: Nextcloud Server admins can change authentication details of user configured external storage

    Details: Nextcloud Server provides data storage for Nextcloud, an open source cloud platform. Starting in version 25.0.0 and prior to versions 25.0.11, 26.0.6, and 27.1.0 of Nextcloud Server and Nextcloud Enterprise Server, admins can change authentication details of user configured external storage. Nextcloud Server and Nextcloud Enterprise Server versions 25.0.11, 26.0.6, and 27.1.0 contain a patch for this issue. No known workarounds are available.

    References: https://hackerone.com/reports/2107934, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/48xxx/CVE-2023-48303.json, https://github.com/nextcloud/security-advisories/security/advisories/GHSA-2448-44rp-c7hh, https://nvd.nist.gov/vuln/detail/CVE-2023-48303, https://github.com/nextcloud/server/pull/39895

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 20ea9a25353129b56d46951fe7d23939665ab2b2
    Fixed -97d754dcf1aa3f166ead03a9f6a9165270c73647

    Affected versions

    v27.1.0rc4
    v27.1.0rc3
    v27.1.0rc2
    v27.1.0rc1
    v27.1.0beta3
    v27.1.0beta2

    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-2023-48303 | CVE-DB