CVE-2025-11948: Document Management System RCE Vulnerability

CVE-2025-11948 Overview

CVE-2025-11948 is a critical Arbitrary File Upload vulnerability in the Document Management System developed by Excellent Infotek. This vulnerability allows unauthenticated remote attackers to upload and execute web shell backdoors on the server, thereby enabling arbitrary code execution. The flaw stems from improper validation of uploaded files (CWE-434: Unrestricted Upload of File with Dangerous Type), which permits malicious actors to bypass security controls and gain complete control over affected systems.

Critical Impact

Unauthenticated attackers can upload and execute web shells remotely, leading to full server compromise and arbitrary code execution without any authentication requirements.

Affected Products

• Excellent Infotek Document Management System (specific versions not disclosed)

Discovery Timeline

• October 20, 2025 - CVE-2025-11948 published to NVD
• November 12, 2025 - Last updated in NVD database

Technical Details for CVE-2025-11948

Vulnerability Analysis

This vulnerability exists due to insufficient file upload validation in the Excellent Infotek Document Management System. The application fails to properly verify the type, content, and extension of files being uploaded by users. Since no authentication is required to exploit this flaw, any remote attacker with network access to the vulnerable system can upload malicious files directly to the server.

The lack of proper file type restrictions means attackers can upload executable server-side scripts such as web shells. Once uploaded, these malicious files can be accessed and executed through the web server, granting the attacker the ability to run arbitrary commands on the underlying operating system with the privileges of the web server process.

Root Cause

The root cause of this vulnerability is CWE-434: Unrestricted Upload of File with Dangerous Type. The Document Management System does not implement adequate controls to:

• Validate file extensions against a whitelist of allowed types
• Verify file content matches the declared file type
• Restrict upload directories from executing scripts
• Require authentication before allowing file uploads

This combination of missing security controls creates a direct path for attackers to plant malicious code on the server.

Attack Vector

The attack vector for CVE-2025-11948 is network-based and requires no authentication or user interaction. An attacker can exploit this vulnerability by:

1. Identifying an exposed Excellent Infotek Document Management System instance
2. Crafting a malicious web shell file (such as PHP, ASP, or JSP depending on the server configuration)
3. Uploading the web shell through the vulnerable file upload functionality without authentication
4. Navigating to the uploaded file's location on the web server
5. Executing arbitrary commands through the web shell interface

The vulnerability allows complete compromise of the server, potentially leading to data theft, lateral movement within the network, installation of additional malware, or use of the compromised system as a pivot point for further attacks.

For detailed technical information, refer to the TW-CERT Security Advisory.

Detection Methods for CVE-2025-11948

Indicators of Compromise

• Unexpected files with executable extensions (.php, .asp, .aspx, .jsp, .jspx) appearing in upload directories
• Web server logs showing requests to unusual file paths in document storage locations
• Unusual outbound network connections from the web server process
• Command execution artifacts or new processes spawned by the web server user account

Detection Strategies

• Monitor file upload directories for creation of files with executable extensions or suspicious content patterns
• Implement web application firewall rules to detect and block web shell signatures in uploaded content
• Enable file integrity monitoring on web-accessible directories to alert on unexpected file modifications
• Analyze web server access logs for requests to recently uploaded files with unusual patterns

Monitoring Recommendations

• Deploy endpoint detection and response (EDR) solutions on systems running the Document Management System
• Configure SIEM alerts for web shell indicators and suspicious file upload activity
• Implement network traffic analysis to detect command-and-control communications from compromised servers
• Regularly audit file upload functionality and review uploaded content for malicious payloads

How to Mitigate CVE-2025-11948

Immediate Actions Required

• Restrict network access to the Document Management System to trusted IP ranges only
• Implement authentication requirements for all file upload functionality
• Configure the web server to prevent execution of scripts in upload directories
• Review existing uploaded files for potential web shells and remove any suspicious content
• Monitor affected systems for signs of compromise

Patch Information

Organizations using the Excellent Infotek Document Management System should contact the vendor directly for patch availability and remediation guidance. Additional information may be available through the TW-CERT Security Advisory and CHT Security News Update.

Workarounds

• Place the Document Management System behind a VPN or firewall to restrict access from untrusted networks
• Implement a web application firewall with rules to block malicious file uploads and known web shell patterns
• Configure the web server to return static content for upload directories, preventing script execution
• Enable strict file type validation at the network perimeter using content inspection
• Implement temporary access controls requiring authentication for all document upload operations

# Example: Apache configuration to disable script execution in upload directory
<Directory "/var/www/html/uploads">
    # Disable PHP execution
    php_admin_flag engine off
    
    # Deny access to executable file types
    <FilesMatch "\.(php|phtml|php3|php4|php5|asp|aspx|jsp|jspx|cgi|pl|py)$">
        Require all denied
    </FilesMatch>
    
    # Set default content type to force download
    ForceType application/octet-stream
</Directory>