CVE-2022-4583Public exploitNetwork attack vector

Arbitrary file write via unchecked archive paths

Published Dec 17, 2022 · Updated Apr 15, 2025

Path traversal in LEMS jLEMS allows remote attackers to write files outside the extraction directory through a crafted JAR archive. The unpackJar function joins each untrusted JarEntry name to the output directory and writes it without first verifying that the normalized path remains inside that directory. A victim must cause the crafted archive to be processed; executable impact requires overwriting a security-sensitive file.

CVSS severity8.8
High
EPSS probability0.83%
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 LEMS jLEMS allows remote attackers to write files outside the extraction directory through a crafted JAR archive. The unpackJar function joins each untrusted JarEntry name to the output directory and writes it without first verifying that the normalized path remains inside that directory. A victim must cause the crafted archive to be processed; executable impact requires overwriting a security-sensitive file.

The record

CVE
CVE-2022-4583
Published
Dec 17, 2022
Updated
Apr 15, 2025
Vendor
LEMS
Product
jLEMS
Classifications
CWE-22, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LEMS · jLEMSversion=n/a

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002User Execution: Malicious File

Public exploit references

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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