CVE-2022-4402Public exploitNetwork attack vector

Server-side code execution via unchecked ZIP paths

Published Dec 11, 2022 · Updated Apr 15, 2025

Path traversal in RainyGao DocSys 2.02.37 allows remote authenticated users to write files outside the upgrade directory via a ZIP entry. The BaseController.unZip method joins the attacker-controlled entry.getName() path without rejecting ../ sequences, and ManageController.upgradeSystem extracts the uploaded archive into the web application. Administrator or super-administrator access is required; a crafted archive can overwrite writable files or place a JSP in the web root for server-side code execution.

CVSS severity4.7
Medium
EPSS probability0.72%
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 RainyGao DocSys 2.02.37 allows remote authenticated users to write files outside the upgrade directory via a ZIP entry. The BaseController.unZip method joins the attacker-controlled entry.getName() path without rejecting ../ sequences, and ManageController.upgradeSystem extracts the uploaded archive into the web application. Administrator or super-administrator access is required; a crafted archive can overwrite writable files or place a JSP in the web root for server-side code execution.

The record

CVE
CVE-2022-4402
Published
Dec 11, 2022
Updated
Apr 15, 2025
Vendor
RainyGao
Product
DocSys
Classifications
CWE-22, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 11, 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=2.02.37

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

RainyGao · DocSysversion=2.02.37

Published CVSS scores

7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.7VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

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

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1505.003Server Software Component: Web Shell

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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