CVE-2026-54416Network attack vector

Administrator RCE via omitted .php8 blacklist entry

Published Aug 5, 2026 · Updated Aug 5, 2026

Unrestricted file upload in Pluck CMS 4.7.21 and earlier allows remote authenticated users to execute PHP code via a .php8 file. The admin file manager in data/inc/files.php compares only the filename's last four or five characters against a fixed denylist that omits .php8, then stores the upload unchanged. Administrator access and a web server configured to execute .php8 files as PHP are required, after which uploaded code runs with the web application's privileges.

CVSS severity7.2
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Unrestricted file upload in Pluck CMS 4.7.21 and earlier allows remote authenticated users to execute PHP code via a .php8 file. The admin file manager in data/inc/files.php compares only the filename's last four or five characters against a fixed denylist that omits .php8, then stores the upload unchanged. Administrator access and a web server configured to execute .php8 files as PHP are required, after which uploaded code runs with the web application's privileges.

The record

CVE
CVE-2026-54416
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Pluck CMS
Product
Pluck CMS
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=4.7.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Pluck CMS · Pluck CMSversion=0 <=4.7.21

Published CVSS scores

7.2TuranSecCVSS: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 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
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo