Pluck CMS up to 4.7.21 Admin File Management data/inc/files.php unrestricted upload

Summaryinfo

A vulnerability classified as problematic was found in Pluck CMS up to 4.7.21. Affected by this vulnerability is an unknown functionality of the file data/inc/files.php of the component Admin File Management. Such manipulation leads to unrestricted upload. This vulnerability is listed as CVE-2026-54416. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Pluck CMS up to 4.7.21 and classified as problematic. Affected by this issue is an unknown function of the file data/inc/files.php of the component Admin File Management. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Pluck CMS through 4.7.21 restricts dangerous file uploads in its admin file-management feature using a fixed blacklist in data/inc/files.php ('.php','php3','php4','php5','php6','php7','phtml','.phtm','.pht','.ph3','.ph4','.ph5','.asp','.cgi','.phar'), checked against the last 4-5 characters of the filename. The blacklist omits the '.php8' extension. An authenticated administrator can upload a file named e.g. shell.php8, which is stored unmodified and, on servers running PHP 8.x, is executed as PHP by the web server, resulting in remote code execution.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-54416 since 06/13/2026. The exploitation is known to be easy. The attack may be launched remotely. Additional levels of successful authentication are necessary for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/05/2026). This vulnerability is assigned to T1608.002 by the MITRE ATT&CK project.

By approaching the search of inurl:data/inc/files.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Content Management System

Vendor

• Pluck

Name

• CMS

Version

• 4.7.0
• 4.7.1
• 4.7.2
• 4.7.3
• 4.7.4
• 4.7.5
• 4.7.6
• 4.7.7
• 4.7.8
• 4.7.9
• 4.7.10
• 4.7.11
• 4.7.12
• 4.7.13
• 4.7.14
• 4.7.15
• 4.7.16
• 4.7.17
• 4.7.18
• 4.7.19
• 4.7.20
• 4.7.21

License

• open-source

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CPE 2.2info

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