CVE-2017-0881

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    CVE-2017-0881

    Published: 28 Mar 2017Last Modified: 7 Aug 2026

    Summary:

    Details: An error in the implementation of an autosubscribe feature in the check_stream_exists route of the Zulip group chat application server before 1.4.3 allowed an authenticated user to subscribe to a private stream that should have required an invitation from an existing member to join. The issue affects all previously released versions of the Zulip server.

    References: http://www.securityfocus.com/bid/97159, https://github.com/zulip/zulip/commit/7ecda1ac8e26d8fb3725e954b2dc4723dda2255f, https://groups.google.com/d/msg/zulip-announce/VyawgRuoY34/NTBwnTArGwAJ

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -a063dd3b26f7ada794e14ace0d24ea1834611446

    Affected versions

    1.4.2
    1.4.1
    1.4.0

    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