CVE-2022-39221Network attack vector

Host file disclosure via HTTP path traversal

Published Sep 20, 2022 · Updated Apr 23, 2025

Path traversal in JonasunderscoreJones McWebserver before 0.2.0 allows remote attackers to read host files through crafted HTTP requests. The HTTP server request handler resolves the supplied URL path as a filesystem target without rejecting parent-directory segments that escape the configured web root. No authentication or user interaction is required; disclosure is limited to files readable by the Minecraft server process.

CVSS severity7.5
High
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in JonasunderscoreJones McWebserver before 0.2.0 allows remote attackers to read host files through crafted HTTP requests. The HTTP server request handler resolves the supplied URL path as a filesystem target without rejecting parent-directory segments that escape the configured web root. No authentication or user interaction is required; disclosure is limited to files readable by the Minecraft server process.

The record

CVE
CVE-2022-39221
Published
Sep 20, 2022
Updated
Apr 23, 2025
Vendor
JonasunderscoreJones
Product
McWebserver
Classifications
CWE-22, T1005, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JonasunderscoreJones · McWebserverversion=< 0.2.0

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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