CVE-2022-3771Network attack vector

Dangerous file upload via missing type validation

Published Oct 31, 2022 · Updated Apr 15, 2025

Unrestricted file upload in Noumo EasyiiCMS 0.9 and earlier allows remote authenticated users to store dangerous files under the web root. Upload::file retains the submitted extension when constructing a filename and passes the result to saveAs without validating the file type. A valid low-privilege account is required; consequences depend on server handling of the stored file, so code execution is not established.

CVSS severity6.3
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Noumo EasyiiCMS 0.9 and earlier allows remote authenticated users to store dangerous files under the web root. Upload::file retains the submitted extension when constructing a filename and passes the result to saveAs without validating the file type. A valid low-privilege account is required; consequences depend on server handling of the stored file, so code execution is not established.

The record

CVE
CVE-2022-3771
Published
Oct 31, 2022
Updated
Apr 15, 2025
Vendor
Noumo
Product
EasyiiCMS
Classifications
CWE-266, CWE-284, CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 31, 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 privilegesauthenticated

What is affected?

Noumo · EasyiiCMSversion=n/a

Published CVSS scores

6.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-266Incorrect Privilege Assignment
CWE-284Improper Access Control
CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

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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