CVE-2021-43203

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    CVE-2021-43203

    Published: 9 Nov 2021Last Modified: 9 Jul 2026

    Summary:

    Details: In JetBrains Ktor before 1.6.4, nonce verification during the OAuth2 authentication process is implemented improperly.

    References: https://blog.jetbrains.com/blog/2021/11/08/jetbrains-security-bulletin-q3-2021/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -832b70cff2522f1c6844c32fe8509a10e5a2ce4b

    Affected versions

    1.6.3
    1.6.2
    1.6.1
    1.6.0

    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