CVE-2023-3623Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted ASPX upload

Published Jul 11, 2023 · Updated Nov 7, 2024

Unrestricted upload in Mountain Flood Disaster Prevention Monitoring and Early Warning System 20230704 allows remote attackers to upload web shells. The Duty module's /Duty/AjaxHandle/UploadHandler.ashx endpoint accepts a multipart Filedata filename and ASPX content without restricting dangerous file types. No authentication is required, and a successful upload places attacker-controlled server-side code where the web server can execute it.

CVSS severity6.3
Medium
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted upload in Mountain Flood Disaster Prevention Monitoring and Early Warning System 20230704 allows remote attackers to upload web shells. The Duty module's /Duty/AjaxHandle/UploadHandler.ashx endpoint accepts a multipart Filedata filename and ASPX content without restricting dangerous file types. No authentication is required, and a successful upload places attacker-controlled server-side code where the web server can execute it.

The record

CVE
CVE-2023-3623
Published
Jul 11, 2023
Updated
Nov 7, 2024
Vendor
Istrong
Product
Mountain Flood Disaster Prevention Monitoring and Early Warning System
Classifications
CWE-434, CAPEC-1, T1505.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 11, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2024Record 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=20230704

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Istrong · Mountain Flood Disaster Prevention Monitoring and Early Warning Systemversion=20230704

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8NVDCVSS: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 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-434Unrestricted Upload of File with Dangerous Type
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
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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