Critical severityNVD Advisory· Published May 16, 2022· Updated Aug 3, 2024
CVE-2021-33318
CVE-2021-33318
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
IpMatcherNuGet | < 1.0.4.2 | 1.0.4.2 |
Affected products
2- Joel Christner .NET C# packages/WatsonWebserver, IpMatcherdescription
Patches
Vulnerability mechanics
Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.
References
4- github.com/advisories/GHSA-qj93-37f5-mr29ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-33318ghsaADVISORY
- github.com/jchristn/IpMatcher/commit/81d77c2f33aa912dbd032b34b9e184fc6e041d89ghsax_refsource_MISCWEB
- github.com/kaoudis/advisories/blob/main/0-2021.mdghsax_refsource_MISCWEB
News mentions
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