CVE-2023-28170Network attack vector

Administrator arbitrary file upload

Published Dec 20, 2023 · Updated Apr 28, 2026

Unrestricted file upload in Themely Theme Demo Import 1.1.1 and earlier allows remote authenticated users to write files to the server. Public disclosures do not identify the upload handler or specify which filename, extension, MIME-type, or content validation is absent. Administrator privileges are required; uploaded server-executable content enables code execution when the web server executes its file type.

CVSS severity9.1
Critical
EPSS probability0.80%
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 Themely Theme Demo Import 1.1.1 and earlier allows remote authenticated users to write files to the server. Public disclosures do not identify the upload handler or specify which filename, extension, MIME-type, or content validation is absent. Administrator privileges are required; uploaded server-executable content enables code execution when the web server executes its file type.

The record

CVE
CVE-2023-28170
Published
Dec 20, 2023
Updated
Apr 28, 2026
Vendor
Themely
Product
Theme Demo Import
Classifications
CWE-434, T1105
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Dec 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record 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=n/a <=1.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Themely · Theme Demo Importversion=n/a <=1.1.1

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
9.1PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

Public exploit references

No public exploit references are available in this record.

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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