CVE-2025-9509: Admerc Apartment Management System SQL Injection

CVE-2025-9509 Overview

A SQL injection vulnerability has been discovered in itsourcecode Apartment Management System version 1.0. This security flaw affects the processing of the file /report/fair_info_all.php, where manipulation of the fid argument enables SQL injection attacks. The vulnerability can be exploited remotely without authentication, and exploit details have been publicly disclosed, increasing the risk of active exploitation.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract, modify, or delete sensitive database information including tenant records, financial data, and administrative credentials without requiring authentication.

Affected Products

• Admerc Apartment Management System 1.0
• itsourcecode Apartment Management System 1.0

Discovery Timeline

• 2025-08-27 - CVE-2025-9509 published to NVD
• 2025-09-02 - Last updated in NVD database

Technical Details for CVE-2025-9509

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Injection) exists in the /report/fair_info_all.php file of the Apartment Management System. The application fails to properly sanitize user-supplied input in the fid parameter before incorporating it into SQL queries. This allows attackers to inject malicious SQL statements that are executed by the database server with the privileges of the application's database user.

The vulnerability is accessible over the network and requires no authentication or user interaction to exploit. Successful exploitation could lead to unauthorized access to confidential data, data integrity compromise, and potential system availability impacts.

Root Cause

The root cause of this vulnerability is improper input validation and lack of parameterized queries in the PHP code handling the fid parameter. The application directly concatenates user input into SQL query strings without sanitization, escaping, or use of prepared statements. This is a classic injection vulnerability pattern where untrusted input is treated as code rather than data.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can craft malicious HTTP requests targeting the /report/fair_info_all.php endpoint with SQL injection payloads in the fid parameter. The attack requires no privileges and no user interaction, making it trivially exploitable by automated scanning tools or manual testing.

The vulnerability allows attackers to manipulate SQL query logic to bypass authentication, extract sensitive data through UNION-based or blind SQL injection techniques, modify or delete database records, and potentially escalate to command execution if database features like xp_cmdshell (SQL Server) or INTO OUTFILE (MySQL) are available and enabled.

For detailed technical information about the vulnerability, refer to the GitHub Issue for CVE-45 and the VulDB Entry #321502.

Detection Methods for CVE-2025-9509

Indicators of Compromise

• Unusual SQL error messages in web server logs referencing /report/fair_info_all.php
• HTTP requests to /report/fair_info_all.php containing SQL syntax characters such as single quotes, double dashes, UNION, SELECT, or OR 1=1 patterns in the fid parameter
• Database query logs showing unexpected queries or data exfiltration attempts
• Unauthorized database access or modifications to tenant and financial records

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the fid parameter
• Configure intrusion detection systems to alert on requests containing common SQL injection signatures targeting the vulnerable endpoint
• Implement application-level logging to monitor all requests to /report/fair_info_all.php with parameter values
• Use database activity monitoring to detect anomalous query patterns or unauthorized data access

Monitoring Recommendations

• Enable verbose logging on web servers to capture full request URIs and parameters
• Monitor database logs for queries containing injection patterns or syntax errors
• Set up alerts for multiple failed or unusual requests to the affected PHP file
• Regularly review access logs for scanning activity from unknown IP addresses targeting the application

How to Mitigate CVE-2025-9509

Immediate Actions Required

• Remove or disable access to the /report/fair_info_all.php file until a patch is applied
• Implement WAF rules to block requests containing SQL injection patterns in the fid parameter
• Restrict network access to the Apartment Management System to trusted IP ranges only
• Review database logs for signs of prior exploitation and assess data integrity

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations using the itsourcecode Apartment Management System should monitor the IT Source Code Resource page for security updates. If the application is mission-critical, consider engaging a developer to implement parameterized queries or prepared statements for the affected endpoint.

For additional vulnerability details, see the VulDB CTI ID #321502.

Workarounds

• Implement input validation to restrict the fid parameter to expected data types (integers only)
• Use prepared statements or parameterized queries if modifying the source code is possible
• Deploy a reverse proxy with SQL injection filtering capabilities in front of the application
• Consider replacing the vulnerable application with a more secure alternative if patches are unavailable

# Example: Block access to vulnerable endpoint using Apache .htaccess
<Files "fair_info_all.php">
    Order Deny,Allow
    Deny from all
    # Allow from trusted IP only if needed
    # Allow from 192.168.1.0/24
</Files>