CVE-2024-40125Public exploitNetwork attack vector

Unauthenticated code execution via unrestricted PHP upload

Published Sep 19, 2024 · Updated Sep 20, 2024

Arbitrary file upload in Closed-loop Technology Pte Ltd CLESS Server 4.5.2 allows remote attackers to execute code via a crafted PHP file. The Media Manager upload endpoint accepts a PHP file without restricting its dangerous executable type, allowing the server to execute the uploaded content. No authentication or user interaction is required, so network access to the endpoint is sufficient for arbitrary server-side code execution.

CVSS severity9.8
Critical
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Closed-loop Technology Pte Ltd CLESS Server 4.5.2 allows remote attackers to execute code via a crafted PHP file. The Media Manager upload endpoint accepts a PHP file without restricting its dangerous executable type, allowing the server to execute the uploaded content. No authentication or user interaction is required, so network access to the endpoint is sufficient for arbitrary server-side code execution.

The record

CVE
CVE-2024-40125
Published
Sep 19, 2024
Updated
Sep 20, 2024
Vendor
Closed-loop Technology Pte Ltd
Product
CLESS Server
Classifications
CWE-434, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 19, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 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=4.5.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Closed-loop Technology Pte Ltd · CLESS Serverversion=4.5.2

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

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-434Unrestricted Upload of File with Dangerous Type
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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