CVE-2024-31012Public exploitNetwork attack vector

Authenticated code execution via NTFS filename handling

Published Apr 3, 2024 · Updated Aug 2, 2024

Arbitrary file upload in Sem-Cms SEMCMS 4.8 allows remote authenticated users to execute PHP code through a crafted upload request. SECMMS_upload.php accepts a wname value such as 1.jpg.php: and writes the supplied file so NTFS resolves it as an executable PHP file rather than the checked image name. Exploitation requires Web Administrator Console access and a Windows deployment on NTFS; successful use installs a web shell that runs with the web server's privileges.

CVSS severity9.8
Critical
EPSS probability1.16%
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 Sem-Cms SEMCMS 4.8 allows remote authenticated users to execute PHP code through a crafted upload request. SECMMS_upload.php accepts a wname value such as 1.jpg.php: and writes the supplied file so NTFS resolves it as an executable PHP file rather than the checked image name. Exploitation requires Web Administrator Console access and a Windows deployment on NTFS; successful use installs a web shell that runs with the web server's privileges.

The record

CVE
CVE-2024-31012
Published
Apr 3, 2024
Updated
Aug 2, 2024
Vendor
Sem-Cms
Product
SEMCMS
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=4.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sem-Cms · SEMCMSversion=4.8

Published CVSS scores

9.8CISA-ADPCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
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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