CVE-2022-4511Public exploitNetwork attack vector

Unauthenticated file read via avatar path traversal

Published Dec 15, 2022 · Updated Apr 14, 2025

Path traversal in RainyGao DocSys allows remote attackers to read arbitrary server files through the user-avatar endpoint. UserController#getUserImg passes the controllable fileName value to file retrieval without confining the resolved path, so ../ segments escape the avatar directory. No login is required because MyInterceptor#preHandle checks allowed URLs with substring matching, and a crafted auxiliary parameter bypasses that check.

CVSS severity5.3
Medium
EPSS probability0.78%
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 allows remote attackers to read arbitrary server files through the user-avatar endpoint. UserController#getUserImg passes the controllable fileName value to file retrieval without confining the resolved path, so ../ segments escape the avatar directory. No login is required because MyInterceptor#preHandle checks allowed URLs with substring matching, and a crafted auxiliary parameter bypasses that check.

The record

CVE
CVE-2022-4511
Published
Dec 15, 2022
Updated
Apr 14, 2025
Vendor
RainyGao
Product
DocSys
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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?

RainyGao · DocSysversion=n/a

Published CVSS scores

5.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
7.5NVDCVSS: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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

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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