CVE-2021-32689

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    CVE-2021-32689

    Published: 12 Jul 2021Last Modified: 7 Aug 2026

    Summary:

    Details: Nextcloud Talk is a fully on-premises audio/video and chat communication service. In versions prior to 11.2.2, if a user was able to reuse an earlier used username, they could get access to any chat message sent to the previous user with this username. The issue was patched in versions 11.2.2 and 11.3.0. As a workaround, don't allow users to choose usernames themselves. This is the default behaviour of Nextcloud, but some user providers may allow doing so.

    References: https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xv6f-344w-895c, https://github.com/nextcloud/spreed/releases/tag/v11.2.2, https://github.com/nextcloud/spreed/releases/tag/v11.3.0, https://hackerone.com/reports/1200700, https://github.com/nextcloud/spreed/pull/5633

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -1d3c90d7121cd06c6a4c7bd23729eac9fbf595f5

    Affected versions

    v11.2.1
    v11.2.0

    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-2021-32689 | CVE-DB