CVE-2023-47621Network attack vector

Authenticated code execution via unchecked PHP uploads

Published Nov 13, 2023 · Updated Sep 3, 2024

Unrestricted file upload in Duncan McClean Guest Entries before 3.1.2 allows remote authenticated users to execute PHP on the server. The uploadFile method in GuestEntryController accepted client filenames without rejecting PHP-family extensions before saving them as assets. An authenticated user with access to a configured front-end upload field can place server-executable PHP content and run code in the site's context.

CVSS severity8.8
High
EPSS probability1.02%
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 Duncan McClean Guest Entries before 3.1.2 allows remote authenticated users to execute PHP on the server. The uploadFile method in GuestEntryController accepted client filenames without rejecting PHP-family extensions before saving them as assets. An authenticated user with access to a configured front-end upload field can place server-executable PHP content and run code in the site's context.

The record

CVE
CVE-2023-47621
Published
Nov 13, 2023
Updated
Sep 3, 2024
Vendor
Duncan McClean
Product
Guest Entries
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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=0 <3.1.2
  2. Affected versionversion=< 3.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Duncan McClean · Guest Entriesversion=0 <3.1.2; version=< 3.1.2

Published CVSS scores

8.8GitHub CNACVSS: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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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