CVE-2021-21363

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    CVE-2021-21363

    Published: 11 Mar 2021Last Modified: 9 Jul 2026

    Summary:

    Details: swagger-codegen is an open-source project which contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition. In swagger-codegen before version 2.4.19, on Unix like systems, the system's temporary directory is shared between all users on that system. A collocated user can observe the process of creating a temporary sub directory in the shared temporary directory and race to complete the creation of the temporary subdirectory. This vulnerability is local privilege escalation because the contents of the `outputFolder` can be appended to by an attacker. As such, code written to this directory, when executed can be attacker controlled. For more details refer to the referenced GitHub Security Advisory. This vulnerability is fixed in version 2.4.19. Note this is a distinct vulnerability from CVE-2021-21364.

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Affected versions

    v2.4.18
    v2.4.17
    v2.4.16
    v2.4.15
    v2.4.14
    v2.4.13
    v2.4.12
    v2.4.11
    v2.4.10
    v2.4.9
    v2.4.8
    v2.4.7
    v2.4.6
    v2.4.5
    v2.4.4
    v2.4.3
    v2.4.2
    v2.4.1
    v2.4.0

    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
    CVE-2021-21363 | CVE-DB