CVE-2025-14532: Studiofabryka Dorbycms RCE Vulnerability

CVE-2025-14532 Overview

CVE-2025-14532 is a critical unrestricted file upload vulnerability affecting DobryCMS, a content management system developed by Studiofabryka. The vulnerability exists in the upload file functionality, which allows unauthenticated remote attackers to upload files of any type and extension without restriction. This severe security flaw can be exploited to achieve Remote Code Execution (RCE) on vulnerable systems.

The lack of authentication requirements combined with missing file type validation creates a direct path for attackers to upload malicious scripts (such as PHP web shells) to the web server, which can then be executed to gain full control over the affected system.

Critical Impact

Unauthenticated attackers can upload arbitrary files including web shells to achieve complete system compromise through Remote Code Execution.

Affected Products

• Studiofabryka DobryCMS versions prior to 5.0
• DobryCMS installations with default upload functionality enabled

Discovery Timeline

• 2026-03-02 - CVE-2025-14532 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2025-14532

Vulnerability Analysis

This vulnerability falls under CWE-434 (Unrestricted Upload of File with Dangerous Type), a well-known class of web application security flaws. The DobryCMS file upload mechanism fails to implement critical security controls that would prevent malicious file uploads.

In a properly secured upload implementation, several defensive layers should exist: authentication to verify user identity, authorization to confirm upload permissions, file type validation against an allowlist, content-type verification, and file extension sanitization. The vulnerable DobryCMS implementation lacks all of these controls, creating a severe attack surface.

The network-accessible nature of this vulnerability means that any attacker with HTTP access to the CMS can exploit it without prior authentication or user interaction. Once a malicious file is uploaded, the attacker can typically access it via a predictable URL path, triggering code execution with the privileges of the web server process.

Root Cause

The root cause of CVE-2025-14532 is the complete absence of file upload validation and authentication checks in the DobryCMS upload functionality. The application accepts and stores any file submitted through the upload endpoint without verifying:

• Whether the request originates from an authenticated user
• The file extension against a secure allowlist
• The actual file content type (magic bytes)
• Whether the file contains executable code

This design flaw allows attackers to bypass any intended access controls and directly upload executable scripts to the server's web-accessible directory.

Attack Vector

The attack vector for CVE-2025-14532 is network-based and requires no authentication or user interaction. An attacker can exploit this vulnerability by:

1. Identifying a vulnerable DobryCMS installation
2. Crafting an HTTP request to the file upload endpoint
3. Uploading a malicious script file (e.g., a PHP web shell with a .php extension)
4. Accessing the uploaded file via its URL to trigger execution
5. Achieving remote code execution with web server privileges

The vulnerability allows uploading files with any extension, including dangerous executable types such as .php, .phtml, .jsp, or other server-side script extensions. Once executed, the attacker gains the ability to run arbitrary commands on the underlying server.

Detection Methods for CVE-2025-14532

Indicators of Compromise

• Unexpected files appearing in DobryCMS upload directories, particularly with executable extensions (.php, .phtml, .jsp)
• Web server logs showing unauthenticated POST requests to upload endpoints followed by GET requests to newly created files
• Presence of web shell signatures in uploaded files
• Unusual outbound network connections originating from the web server process
• Evidence of command execution in web server error logs

Detection Strategies

• Implement file integrity monitoring on DobryCMS upload directories to detect unauthorized file additions
• Deploy web application firewalls (WAF) with rules to detect file upload attacks and web shell signatures
• Monitor web server access logs for suspicious patterns of upload requests followed by direct file access
• Use endpoint detection and response (EDR) solutions to identify post-exploitation activities
• Scan upload directories regularly for files with executable extensions or known web shell signatures

Monitoring Recommendations

• Enable detailed logging for all file upload operations in DobryCMS
• Configure alerts for any newly created files with executable extensions in upload directories
• Monitor for process spawning from web server parent processes (e.g., httpd, nginx, php-fpm)
• Implement network monitoring to detect command-and-control traffic from compromised servers
• Review access logs for requests to upload directories that bypass normal application flow

How to Mitigate CVE-2025-14532

Immediate Actions Required

• Upgrade DobryCMS to version 5.0 or later, which contains the fix for this vulnerability
• If immediate upgrade is not possible, disable or restrict access to the file upload functionality
• Review upload directories for any suspicious or unexpected files and remove malicious content
• Implement network-level restrictions to limit access to the CMS administration interface
• Deploy a web application firewall to filter malicious upload attempts

Patch Information

This vulnerability was fixed in DobryCMS versions above 5.0. Administrators should upgrade to the latest available version to remediate this security issue. For additional technical details about this vulnerability, refer to the CERT Poland security analysis.

Workarounds

• Disable the file upload functionality entirely until a patch can be applied
• Implement authentication requirements at the web server level (e.g., HTTP Basic Auth) for upload endpoints
• Configure the web server to deny execution of scripts in upload directories using .htaccess or server configuration
• Use a reverse proxy or WAF to block requests to the vulnerable upload endpoint
• Restrict upload directory permissions to prevent script execution

# Apache configuration to prevent script execution in upload directories
# Add to .htaccess in the upload directory or server configuration
<Directory "/var/www/html/dorbycms/uploads">
    # Disable script execution
    Options -ExecCGI
    RemoveHandler .php .phtml .php3 .php4 .php5 .php7 .phps
    <FilesMatch "\.(php|phtml|php3|php4|php5|php7|phps)$">
        Require all denied
    </FilesMatch>
</Directory>