CVE-2025-9644: Apartment Management System SQL Injection

CVE-2025-9644 Overview

A SQL Injection vulnerability has been identified in itsourcecode Apartment Management System version 1.0. The vulnerability exists in the /setting/bill_setup.php file, where the txtBillType parameter is susceptible to SQL injection attacks. This flaw allows remote attackers to manipulate database queries through malicious input, potentially leading to unauthorized data access, modification, or deletion.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive tenant and billing data, or potentially gain complete control over the underlying database.

Affected Products

• Admerc Apartment Management System version 1.0

Discovery Timeline

• 2025-08-29 - CVE-2025-9644 published to NVD
• 2025-09-02 - Last updated in NVD database

Technical Details for CVE-2025-9644

Vulnerability Analysis

This SQL Injection vulnerability in the Apartment Management System arises from improper handling of user-supplied input in the billing setup functionality. The txtBillType argument in the /setting/bill_setup.php endpoint does not properly sanitize or parameterize user input before incorporating it into SQL queries. This allows an attacker to inject arbitrary SQL statements that the database will execute with the same privileges as the application.

The vulnerability is remotely exploitable without authentication requirements, making it accessible to any network-based attacker who can reach the affected application. The exploit has been publicly disclosed, increasing the risk of active exploitation in the wild.

Root Cause

The root cause is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection vulnerabilities. The application fails to implement proper input validation and parameterized queries when handling the txtBillType parameter. User-controlled input is directly concatenated into SQL statements without sanitization, escaping, or the use of prepared statements.

Attack Vector

The attack can be executed remotely over the network. An attacker would craft a malicious HTTP request to the /setting/bill_setup.php endpoint, injecting SQL syntax through the txtBillType parameter. Successful exploitation could allow the attacker to:

• Extract sensitive database contents including tenant personal information and billing records
• Modify or delete database entries
• Bypass authentication mechanisms
• Potentially escalate to command execution depending on database configuration

The vulnerability requires no user interaction or special privileges to exploit, as the affected endpoint appears to be accessible without authentication.

Detection Methods for CVE-2025-9644

Indicators of Compromise

• Unusual HTTP requests to /setting/bill_setup.php containing SQL syntax characters such as single quotes, semicolons, UNION, SELECT, or -- comment sequences in the txtBillType parameter
• Database error messages appearing in application logs or HTTP responses indicating malformed SQL queries
• Unexpected database queries or access patterns in database audit logs
• Signs of data exfiltration or unauthorized modifications to billing records

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the bill_setup.php endpoint
• Enable detailed logging on the web server and database to capture suspicious query patterns
• Deploy intrusion detection systems (IDS) with signatures for common SQL injection attack patterns
• Monitor application logs for SQL syntax errors or database exception messages

Monitoring Recommendations

• Configure real-time alerting for HTTP requests containing SQL injection signatures targeting property management endpoints
• Enable database query logging and establish baselines for normal query patterns to identify anomalies
• Implement application performance monitoring to detect unusual database query volumes or execution times
• Review access logs regularly for reconnaissance activity targeting administrative endpoints like /setting/

How to Mitigate CVE-2025-9644

Immediate Actions Required

• Restrict network access to the Apartment Management System to trusted IP addresses or networks only
• Implement a Web Application Firewall with SQL injection protection rules in front of the application
• If possible, disable or restrict access to the /setting/bill_setup.php endpoint until a patch is available
• Review database access logs for signs of prior exploitation attempts

Patch Information

No official vendor patch has been identified at this time. The application is distributed through itsourcecode, and users should monitor the IT Source Code website for security updates. Additional technical details about this vulnerability are available through VulDB #321851 and the associated GitHub issue.

Workarounds

• Implement input validation at the application or reverse proxy layer to reject requests containing SQL injection patterns in the txtBillType parameter
• Deploy a WAF rule to sanitize or block malicious input before it reaches the application
• Apply the principle of least privilege to the database account used by the application to limit potential damage from successful exploitation
• Consider implementing prepared statements or parameterized queries if modifying the source code is feasible
• Isolate the application server from critical network segments to limit lateral movement if compromised

# Example: Apache mod_security rule to block SQL injection in txtBillType
SecRule ARGS:txtBillType "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    msg:'SQL Injection attempt detected in txtBillType parameter',\
    log,\
    auditlog"