CVE-2026-54416
Pluck CMS: Unrestricted File Upload via Missing .php8 Extension in Upload Blacklist
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-434 |
| Vendor | pluck-cms |
| Product | pluck cms |
| Published | Aug 5, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
pluck-cms / Pluck CMS
0 ≤ 4.7.21
Credits
Alijonov Alisher