CVE-2025-11656: Oranbyte School Management System RCE Flaw

CVE-2025-11656 Overview

A critical unrestricted file upload vulnerability has been identified in ProjectsAndPrograms School Management System. This security weakness affects the /assets/editNotes.php file, where improper handling of the File argument allows attackers to upload arbitrary files to the server without proper validation or restrictions. The vulnerability can be exploited remotely and has been publicly disclosed, increasing the risk of exploitation in the wild.

Critical Impact

Remote attackers can upload malicious files to vulnerable School Management System instances, potentially leading to remote code execution, webshell deployment, or complete server compromise.

Affected Products

• Oranbyte School Management System (commit 6b6fae5426044f89c08d0dd101c7fa71f9042a59 and prior)
• ProjectsAndPrograms School Management System (unversioned releases)
• School Management System instances running vulnerable versions of /assets/editNotes.php

Discovery Timeline

• 2025-10-13 - CVE-2025-11656 published to NVD
• 2025-10-16 - Last updated in NVD database

Technical Details for CVE-2025-11656

Vulnerability Analysis

This vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) and CWE-284 (Improper Access Control). The affected component, /assets/editNotes.php, fails to implement proper file type validation when processing uploaded files through the File parameter. This allows attackers to bypass intended security restrictions and upload files with dangerous extensions such as .php, .phtml, or other executable content.

The lack of proper input validation on the file upload functionality creates a direct pathway for attackers to deploy malicious code on the target server. Once uploaded, these files can be accessed directly through the web server, enabling remote code execution with the privileges of the web server process.

Root Cause

The root cause of this vulnerability is the absence of proper file type validation and access control mechanisms in the /assets/editNotes.php script. The application fails to:

1. Validate the file extension against a whitelist of allowed types
2. Check the MIME type of uploaded files
3. Implement proper access control to restrict who can upload files
4. Sanitize the filename to prevent directory traversal attacks

This is compounded by the fact that the School Management System does not use versioning, making it difficult to track which deployments are vulnerable and which may have been patched.

Attack Vector

The vulnerability is exploitable over the network without requiring authentication. An attacker can craft a malicious HTTP request to the /assets/editNotes.php endpoint, manipulating the File parameter to upload arbitrary content. The attack sequence typically involves:

1. Identifying a vulnerable instance of School Management System
2. Crafting a multipart/form-data POST request to /assets/editNotes.php
3. Including a malicious file (such as a PHP webshell) in the File parameter
4. Accessing the uploaded file directly to execute arbitrary code

The network-accessible attack vector and lack of authentication requirements make this vulnerability particularly dangerous for internet-exposed installations. For detailed technical analysis, refer to the GitHub Issue CVE Discussion and VulDB Entry #328073.

Detection Methods for CVE-2025-11656

Indicators of Compromise

• Unexpected files with executable extensions (.php, .phtml, .php5) appearing in the /assets/ directory or upload folders
• HTTP POST requests to /assets/editNotes.php containing multipart form data with suspicious file extensions
• Web server logs showing access to newly created PHP files in unexpected locations
• Anomalous outbound network connections originating from the web server process

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block file upload attempts with dangerous extensions targeting editNotes.php
• Deploy file integrity monitoring (FIM) on the web application directories to detect unauthorized file creation
• Configure SIEM alerts for POST requests to /assets/editNotes.php followed by GET requests to new files in the same directory
• Monitor for PHP execution patterns consistent with webshell activity

Monitoring Recommendations

• Enable detailed logging on web servers hosting School Management System instances
• Configure alerts for any new file creation in web-accessible directories
• Monitor process spawning from web server processes (Apache, nginx, PHP-FPM) for signs of command execution
• Implement network segmentation monitoring to detect lateral movement from compromised web servers

How to Mitigate CVE-2025-11656

Immediate Actions Required

• Restrict or disable access to /assets/editNotes.php until a patch is available
• Implement web server configuration to deny execution of uploaded files in upload directories
• Apply strict firewall rules to limit access to the School Management System to trusted networks only
• Audit existing uploads in the application's file storage locations for suspicious content

Patch Information

As of the last update on 2025-10-16, no official patch information has been provided by the vendor. The School Management System does not use versioning, making it challenging to determine affected and unaffected releases. Organizations should monitor the VulDB Entry and the GitHub repository for updates on available fixes.

Workarounds

• Disable or remove the editNotes.php functionality if not required for business operations
• Implement server-side file type validation using a strict whitelist of allowed extensions
• Configure the web server to prevent execution of scripts in upload directories using .htaccess or nginx configuration
• Deploy a web application firewall with rules to block suspicious file upload attempts

# Example Apache configuration to prevent PHP execution in uploads directory
# Add to .htaccess in the uploads/assets directory
<FilesMatch "\.(php|phtml|php5|php7|phps)$">
    Deny from all
</FilesMatch>

# Alternative: Disable PHP engine entirely for the directory
php_flag engine off