CVE-2023-40204Network attack vector

Authenticated executable file upload via undisclosed handler

Published Dec 20, 2023 · Updated Apr 28, 2026

Unrestricted file upload in Premio Folders 2.9.2 and earlier allows remote authenticated users to upload executable files. Patchstack identifies arbitrary file upload but does not disclose the affected upload handler or the failed file-type validation operation. Author-role access is required; an uploaded backdoor can execute in the WordPress site context and grant further site access.

CVSS severity9.1
Critical
EPSS probability0.83%
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 Premio Folders 2.9.2 and earlier allows remote authenticated users to upload executable files. Patchstack identifies arbitrary file upload but does not disclose the affected upload handler or the failed file-type validation operation. Author-role access is required; an uploaded backdoor can execute in the WordPress site context and grant further site access.

The record

CVE
CVE-2023-40204
Published
Dec 20, 2023
Updated
Apr 28, 2026
Vendor
Premio
Product
Folders
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

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 <=2.9.2 changes=[{"at":"2.9.3","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Premio · Foldersversion=n/a <=2.9.2 changes=[{"at":"2.9.3","status":"unaffected"}]

Published CVSS scores

9.1PatchstackCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Server Software Component: Web Shell

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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