CVE-2024-40546Public exploitNetwork attack vector

Authenticated code execution via unrestricted web-file upload

Published Jul 12, 2024 · Updated Aug 2, 2024

Arbitrary file upload in PublicCMS 4.0.202302.e allows remote authenticated users to execute code through /admin/cmsWebFile/save. The save handler writes attacker-controlled content into the site web-file area without restricting dangerous file types, while sanitizing traversal sequences in the filename. Access to the administrative endpoint and a valid low-privilege account are required; a crafted server-executable file runs with the CMS service process privileges.

CVSS severity8.8
High
EPSS probability0.72%
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 PublicCMS 4.0.202302.e allows remote authenticated users to execute code through /admin/cmsWebFile/save. The save handler writes attacker-controlled content into the site web-file area without restricting dangerous file types, while sanitizing traversal sequences in the filename. Access to the administrative endpoint and a valid low-privilege account are required; a crafted server-executable file runs with the CMS service process privileges.

The record

CVE
CVE-2024-40546
Published
Jul 12, 2024
Updated
Aug 2, 2024
Vendor
Tianjin Black Core Technology Co., LTD.
Product
PublicCMS
Classifications
CWE-94, CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 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=4.0.202302.e

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tianjin Black Core Technology Co., LTD. · PublicCMSversion=4.0.202302.e

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/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 exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
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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