CVE-2025-9643: Apartment Management System SQL Injection

CVE-2025-9643 Overview

A SQL Injection vulnerability has been identified in itsourcecode Apartment Management System version 1.0. The vulnerability exists in the /setting/utility_bill_setup.php file, where improper handling of the txtGasBill parameter allows attackers to inject malicious SQL queries. This flaw enables remote attackers to manipulate database queries, potentially leading to unauthorized data access, modification, or deletion.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data from the database, modify or delete records, and potentially compromise the entire backend database server.

Affected Products

• Admerc Apartment Management System 1.0
• itsourcecode Apartment Management System 1.0
• Applications using the vulnerable /setting/utility_bill_setup.php endpoint

Discovery Timeline

• 2025-08-29 - CVE-2025-9643 published to NVD
• 2025-09-02 - Last updated in NVD database

Technical Details for CVE-2025-9643

Vulnerability Analysis

This SQL Injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) occurs in the Apartment Management System's utility bill configuration functionality. The vulnerable endpoint /setting/utility_bill_setup.php fails to properly sanitize user input passed through the txtGasBill parameter before incorporating it into SQL queries.

The vulnerability is remotely exploitable without authentication, meaning any attacker with network access to the application can craft malicious requests to exploit this flaw. The impact includes potential compromise of data confidentiality, integrity, and availability within the application's database.

Root Cause

The root cause of this vulnerability is the lack of proper input validation and sanitization on the txtGasBill parameter in the /setting/utility_bill_setup.php file. The application directly concatenates user-supplied input into SQL queries without using parameterized queries or prepared statements, allowing attackers to inject arbitrary SQL commands.

This represents a classic SQL injection vulnerability pattern where dynamic SQL construction with untrusted input creates an injection point that can be exploited to manipulate database operations.

Attack Vector

The attack is conducted remotely over the network. An attacker can craft HTTP requests to the vulnerable /setting/utility_bill_setup.php endpoint with malicious SQL syntax injected into the txtGasBill parameter. Since the exploit has been made public, attackers can leverage available proof-of-concept techniques to:

1. Enumerate database structure and extract sensitive information
2. Bypass authentication mechanisms if the parameter is used in authentication logic
3. Modify or delete database records
4. Potentially execute administrative operations on the database server

The vulnerability requires no user interaction or special privileges, making it accessible to any remote attacker who can reach the application.

Detection Methods for CVE-2025-9643

Indicators of Compromise

• Unusual SQL error messages in application logs referencing /setting/utility_bill_setup.php
• HTTP requests to /setting/utility_bill_setup.php containing SQL keywords (SELECT, UNION, DROP, INSERT) in the txtGasBill parameter
• Database query logs showing unexpected or malformed queries originating from the utility bill setup functionality
• Evidence of data exfiltration or unauthorized database access patterns

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns in requests targeting /setting/utility_bill_setup.php
• Implement input validation monitoring to flag requests with special SQL characters in the txtGasBill parameter
• Configure database query logging to capture and alert on suspicious query patterns
• Enable SentinelOne Singularity platform for real-time detection of SQL injection attack attempts

Monitoring Recommendations

• Monitor HTTP access logs for repeated requests to /setting/utility_bill_setup.php with varying parameter payloads
• Set up alerts for database error rates that may indicate injection attempts
• Review web server logs for requests containing encoded SQL injection payloads

How to Mitigate CVE-2025-9643

Immediate Actions Required

• Restrict access to /setting/utility_bill_setup.php via network-level controls or authentication requirements
• Implement Web Application Firewall rules to block SQL injection attempts targeting the vulnerable endpoint
• Consider taking the Apartment Management System offline until patches or workarounds are applied
• Audit database access logs for any evidence of past exploitation

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations using Admerc Apartment Management System 1.0 should monitor the IT Source Code website for updates and security advisories. Additional vulnerability details are available through the VulDB entry and the GitHub issue discussion.

Workarounds

• Implement input validation to sanitize the txtGasBill parameter, rejecting any input containing SQL metacharacters
• Modify the application code to use parameterized queries or prepared statements for all database interactions
• Deploy a reverse proxy or WAF to filter malicious requests before they reach the application
• Restrict network access to the application to trusted IP ranges only

# Example: Apache mod_rewrite rule to block SQL injection attempts
# Add to .htaccess or Apache configuration
RewriteEngine On
RewriteCond %{QUERY_STRING} (union|select|insert|drop|delete|update|;|'|--) [NC]
RewriteRule ^/setting/utility_bill_setup\.php$ - [F,L]