CVE-2023-28409Network attack vector

Unauthenticated arbitrary file upload

Published May 23, 2023 · Updated Jan 31, 2025

Unrestricted file upload in Monkey Wrench Inc. MW WP Form 4.4.2 and earlier allows remote attackers to place arbitrary files. Public records do not identify the upload handler or the validation operation that accepts dangerous file types. No authentication or user interaction is required, and the documented consequence is an unintended file being written through a public form.

CVSS severity5.3
Medium
EPSS probability1.23%
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 Monkey Wrench Inc. MW WP Form 4.4.2 and earlier allows remote attackers to place arbitrary files. Public records do not identify the upload handler or the validation operation that accepts dangerous file types. No authentication or user interaction is required, and the documented consequence is an unintended file being written through a public form.

The record

CVE
CVE-2023-28409
Published
May 23, 2023
Updated
Jan 31, 2025
Vendor
Monkey Wrench Inc.
Product
MW WP Form
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 31, 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=versions v4.4.2 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Monkey Wrench Inc. · MW WP Formversion=versions v4.4.2 and earlier

Published CVSS scores

9.8CISA-ADPCVSS: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
5.0JPCERT/CCAV:N/AC:L/Au:N/C:N/I:P/A:N
5.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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-434Unrestricted Upload of File with Dangerous Type
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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