CVE-2025-11106: Fabian Simple Scheduling System SQLi Flaw

CVE-2025-11106 Overview

A SQL Injection vulnerability has been identified in code-projects Simple Scheduling System version 1.0. This vulnerability affects the /schedulingsystem/addfaculty.php file, where improper handling of the falname argument allows attackers to inject malicious SQL statements. The attack can be executed remotely without authentication, and exploit details have been publicly disclosed.

Critical Impact

Remote attackers can exploit this SQL Injection vulnerability to manipulate database queries, potentially leading to unauthorized data access, data modification, or complete database compromise.

Affected Products

• Fabian Simple Scheduling System 1.0

Discovery Timeline

• 2025-09-28 - CVE-2025-11106 published to NVD
• 2025-10-23 - Last updated in NVD database

Technical Details for CVE-2025-11106

Vulnerability Analysis

This vulnerability stems from inadequate input validation in the addfaculty.php endpoint of the Simple Scheduling System application. The falname parameter is directly incorporated into SQL queries without proper sanitization or parameterized query handling, creating a classic SQL Injection attack surface.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without requiring any prior authentication or user interaction. When successfully exploited, the vulnerability allows attackers to achieve limited impacts on confidentiality, integrity, and availability of the underlying database system. This includes the ability to extract sensitive information, modify existing records, or potentially disrupt database operations.

Root Cause

The root cause of CVE-2025-11106 is CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), specifically manifesting as SQL Injection. The application fails to properly sanitize user-supplied input in the falname parameter before incorporating it into database queries. This allows special SQL characters and commands to be interpreted as part of the query structure rather than as data values.

Attack Vector

The attack is conducted over the network by sending specially crafted HTTP requests to the /schedulingsystem/addfaculty.php endpoint. An attacker manipulates the falname parameter with SQL metacharacters and malicious SQL statements. Since the application lacks proper input validation, these injected SQL commands are executed by the database server with the same privileges as the application's database connection.

The vulnerability can be exploited by crafting HTTP POST or GET requests containing SQL injection payloads in the falname parameter. Common techniques include UNION-based injection to extract data from other tables, boolean-based blind injection to enumerate database contents, or time-based blind injection when direct output is not available. For technical details on exploitation methods, refer to the GitHub Issue #3 disclosure.

Detection Methods for CVE-2025-11106

Indicators of Compromise

• Unusual or malformed HTTP requests targeting /schedulingsystem/addfaculty.php containing SQL syntax patterns
• Web application logs showing requests with SQL keywords (UNION, SELECT, INSERT, DROP, etc.) in the falname parameter
• Database error messages appearing in application logs or responses indicating SQL syntax errors
• Unexpected database queries or query execution times indicating blind SQL injection attempts

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the falname parameter
• Enable detailed logging on the web server and database to capture suspicious query patterns
• Monitor for anomalous database query patterns that deviate from normal application behavior
• Implement intrusion detection signatures for common SQL injection attack payloads

Monitoring Recommendations

• Configure alerts for HTTP requests containing SQL injection signatures targeting the addfaculty.php endpoint
• Review database audit logs for unauthorized data access or modification attempts
• Monitor application error logs for SQL syntax errors that may indicate injection attempts
• Track user input patterns for the falname field to identify malicious payload submissions

How to Mitigate CVE-2025-11106

Immediate Actions Required

• Restrict network access to the vulnerable /schedulingsystem/addfaculty.php endpoint until a patch is available
• Implement input validation to filter or reject requests containing SQL metacharacters in the falname parameter
• Deploy WAF rules to block SQL injection attempts targeting the affected endpoint
• Review and audit database access logs for signs of prior exploitation

Patch Information

No official vendor patch is currently available for this vulnerability. Organizations using Simple Scheduling System 1.0 should contact the vendor for remediation guidance or implement the workarounds described below. Monitor the Code Projects Resource page and VulDB #326187 for updates regarding security patches.

Workarounds

• Implement parameterized queries or prepared statements for all database interactions involving the falname parameter
• Deploy application-level input validation to reject or sanitize SQL metacharacters from user input
• Use a Web Application Firewall with SQL injection detection rules to filter malicious requests
• Consider disabling or restricting access to the addfaculty.php functionality until proper fixes are implemented
• Apply principle of least privilege to database accounts used by the application to limit potential damage

# Example: Restrict access to vulnerable endpoint via Apache .htaccess
<Files "addfaculty.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
</Files>