BIT-nextcloud-2021-41166

    Dashboard / Vulnerabilities / BIT-nextcloud-2021-41166

    BIT-nextcloud-2021-41166

    Published: 12 Jul 2026Last Modified: 8 Sept 2026

    Summary: Permission bypass in Nextcloud Android App

    Details: The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.

    References: https://github.com/nextcloud/android/commit/aa47197109970b8449c4e44601eba36e3481b086, https://github.com/nextcloud/android/commit/b6ecf515b38c2d82d32743f27236534f3e03ee0c, https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wrwg-jwpg-r3c4, https://hackerone.com/reports/1358597, https://nvd.nist.gov/vuln/detail/CVE-2021-41166

    Affected packages

    Package

    Name: nextcloud

    Purl: pkg:bitnami/nextcloud

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -3.17.1

    Affected versions

    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
    BIT-nextcloud-2021-41166 | CVE-DB