CVE-2024-1253Public exploitNetwork attack vector

Authenticated code execution via unrestricted PHP upload

Published Feb 6, 2024 · Updated Jun 10, 2025

Unrestricted file upload in Byzoro Smart S40 Management Platform 20240126 and earlier allows remote authenticated users to execute PHP code. The Import Handler at /useratte/web.php accepts the file_upload filename and content without suffix restrictions, then serves the file from /upload/. A valid high-privilege session is required; the published request uploads a .php file and direct retrieval runs it under the web server.

CVSS severity4.7
Medium
EPSS probability1.70%
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 Byzoro Smart S40 Management Platform 20240126 and earlier allows remote authenticated users to execute PHP code. The Import Handler at /useratte/web.php accepts the file_upload filename and content without suffix restrictions, then serves the file from /upload/. A valid high-privilege session is required; the published request uploads a .php file and direct retrieval runs it under the web server.

The record

CVE
CVE-2024-1253
Published
Feb 6, 2024
Updated
Jun 10, 2025
Vendor
Byzoro
Product
Smart S40 Management Platform
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 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=20240126

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Byzoro · Smart S40 Management Platformversion=20240126

Published CVSS scores

5.8VulDBAV:N/AC:L/Au:M/C:P/I:P/A:P
4.7VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
4.7VulDBCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Web 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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