What’s Vulnerable › Vulnerabilities

CVE-2022-39221: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') McWebserver Minecraft Mod

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-09-21 · updated 2026-06-17
• Weakness: CWE-22

Description

McWebserver mod runs a simple HTTP server alongside the Minecraft server in seperate threads. Path traversal in McWebserver Minecraft Mod for Fabric and Quilt up to and including 0.1.2.1 and McWebserver Minecraft Mod for Forge up to and including 0.1.1 allows all files, accessible by the program, to be read by anyone via HTTP request. Version 0.2.0 with patches are released to both platforms (Fabric and Quilt, Forge). As a workaround, the McWebserver mod can be disabled by removing the file from the `mods` directory.

Affected products

• Mcwebserver Minecraft Mod For Fabric And Quilt Project Mcwebserver Minecraft Mod For Fabric And Quilt: through 0.1.2.1
• Mcwebserver Minecraft Mod For Forge Project Mcwebserver Minecraft Mod For Forge: through 0.1.1

References

• https://github.com/J-onasJones/McWebserver/pull/1
• https://github.com/J-onasJones/McWebserver/security/advisories/GHSA-gcvq-42cx-r46q
• https://github.com/J-onasJones/McWebserver/pull/1
• https://github.com/J-onasJones/McWebserver/security/advisories/GHSA-gcvq-42cx-r46q

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