CVE-2025-69559: Computer Book Store RCE Vulnerability

CVE-2025-69559 Overview

CVE-2025-69559 is an unrestricted file upload vulnerability affecting code-projects Computer Book Store version 1.0. The vulnerability exists in the admin_add.php file, which fails to properly validate uploaded files, potentially allowing attackers to upload malicious files to the server. This type of vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) can lead to remote code execution if an attacker uploads a web shell or other executable content.

Critical Impact

Attackers can exploit this file upload vulnerability to upload malicious files, potentially achieving remote code execution on the affected server without authentication.

Affected Products

• code-projects Computer Book Store 1.0
• Applications using the vulnerable admin_add.php component

Discovery Timeline

• 2026-01-27 - CVE-2025-69559 published to NVD
• 2026-01-29 - Last updated in NVD database

Technical Details for CVE-2025-69559

Vulnerability Analysis

This vulnerability is classified as an unrestricted file upload flaw (CWE-434). The admin_add.php endpoint in the Computer Book Store application does not implement proper file type validation, content verification, or upload restrictions. When a web application allows file uploads without adequate security controls, attackers can bypass intended restrictions and upload files with malicious content.

The network-accessible nature of this vulnerability means that remote attackers can exploit it without requiring any prior authentication or user interaction. Once a malicious file is uploaded, the attacker may be able to execute arbitrary code on the server, leading to complete system compromise.

Root Cause

The root cause is improper input validation in the file upload functionality within admin_add.php. The application fails to:

• Validate file extensions against a whitelist of allowed types
• Verify file content matches the declared file type (MIME type validation)
• Implement proper access controls on the upload functionality
• Sanitize or rename uploaded files to prevent execution

This allows attackers to upload files with dangerous extensions (such as .php, .asp, or .jsp) that can be executed by the web server.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can craft a malicious HTTP request to the admin_add.php endpoint containing a weaponized file. The exploitation process typically involves:

1. Identifying the vulnerable file upload endpoint at admin_add.php
2. Crafting a request with a malicious file payload (e.g., a PHP web shell)
3. Uploading the file to the server
4. Accessing the uploaded file to trigger execution

The vulnerability requires no authentication and no user interaction, making it highly exploitable in exposed deployments.

For technical details regarding this vulnerability, refer to the GitHub Gist documentation and the Gitee issue discussion.

Detection Methods for CVE-2025-69559

Indicators of Compromise

• Unexpected files appearing in upload directories, particularly with executable extensions (.php, .asp, .jsp, .phtml)
• Web server access logs showing requests to admin_add.php with file upload activity
• Newly created files in web-accessible directories that were not created by legitimate users
• Unusual process spawning from the web server process

Detection Strategies

• Monitor HTTP traffic for multipart/form-data requests to admin_add.php containing suspicious file extensions
• Implement file integrity monitoring on upload directories to detect unauthorized file creation
• Deploy web application firewall (WAF) rules to inspect file upload requests for malicious content
• Review web server logs for access patterns indicating exploitation attempts

Monitoring Recommendations

• Enable detailed logging on the web server to capture all file upload attempts
• Set up alerts for new file creation in upload directories with executable extensions
• Monitor for outbound connections from the web server that may indicate post-exploitation activity
• Implement network segmentation to limit lateral movement if the server is compromised

How to Mitigate CVE-2025-69559

Immediate Actions Required

• Remove or disable access to the admin_add.php file if file upload functionality is not required
• Implement authentication controls to restrict access to the upload functionality
• Apply file type validation by checking both file extension and MIME type against a strict whitelist
• Store uploaded files outside the web root directory to prevent direct execution
• Rename uploaded files to random names without preserving user-supplied extensions

Patch Information

No official vendor patch has been identified at this time. Users of code-projects Computer Book Store 1.0 should implement the workarounds described below and monitor the GitHub Gist and Gitee issue for updates.

Workarounds

• Restrict access to admin_add.php using web server access controls (e.g., IP whitelisting, HTTP authentication)
• Disable PHP execution in upload directories using web server configuration
• Implement a web application firewall to filter malicious upload attempts
• Consider replacing the vulnerable component with a secure file upload library

# Apache configuration to disable PHP execution in upload directory
<Directory "/var/www/html/uploads">
    php_admin_flag engine Off
    <FilesMatch "\.php$">
        Deny from all
    </FilesMatch>
</Directory>