CVE-2023-5493Public exploitNetwork attack vector

Authenticated code execution via unrestricted PHP upload

Published Oct 10, 2023 · Updated Aug 2, 2024

Unrestricted file upload in Byzoro Smart S45F 20230928 allows remote authenticated users to execute code through its web interface. The /useratte/web.php endpoint accepts a multipart file_upload value without restricting dangerous file types and stores it under the web-accessible /upload path. A valid PHP session is required, and uploading a PHP payload enables server-side execution with the appliance service's privileges.

CVSS severity6.3
Medium
EPSS probability1.72%
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 S45F 20230928 allows remote authenticated users to execute code through its web interface. The /useratte/web.php endpoint accepts a multipart file_upload value without restricting dangerous file types and stores it under the web-accessible /upload path. A valid PHP session is required, and uploading a PHP payload enables server-side execution with the appliance service's privileges.

The record

CVE
CVE-2023-5493
Published
Oct 10, 2023
Updated
Aug 2, 2024
Vendor
Byzoro
Product
Smart S45F
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 10, 2023CVE 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?

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  1. Affected versionversion=20230928

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Byzoro · Smart S45Fversion=20230928

Published CVSS scores

6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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
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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