CVE-2021-33318

    Dashboard / Vulnerabilities / CVE-2021-33318

    CVE-2021-33318

    Published: 16 May 2022Last Modified: 8 Jul 2026

    Summary:

    Details: An Input Validation Vulnerability exists in Joel Christner .NET C# packages WatsonWebserver, IpMatcher 1.0.4.1 and below (IpMatcher) and 4.1.3 and below (WatsonWebserver) due to insufficient validation of input IP addresses and netmasks against the internal Matcher list of IP addresses and subnets.

    References: https://github.com/jchristn/IpMatcher, https://github.com/jchristn/WatsonWebserver, https://github.com/jchristn/IpMatcher/commit/81d77c2f33aa912dbd032b34b9e184fc6e041d89, https://github.com/kaoudis/advisories/blob/main/0-2021.md

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -81d77c2f33aa912dbd032b34b9e184fc6e041d89

    Affected versions

    1.0.1

    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-2021-33318 | CVE-DB