CVE-2025-9599: Admerc Apartment Management SQL Injection

CVE-2025-9599 Overview

A SQL Injection vulnerability has been identified in itsourcecode Apartment Management System version 1.0. The vulnerability exists in the /setting/month_setup.php file, where the txtMonthName parameter is susceptible to SQL injection due to improper input validation. This flaw allows 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 extract sensitive tenant and property management data, modify database records, or potentially compromise the underlying database server.

Affected Products

• Admerc Apartment Management System 1.0
• itsourcecode Apartment Management System deployments using vulnerable /setting/month_setup.php endpoint

Discovery Timeline

• 2025-08-29 - CVE-2025-9599 published to NVD
• 2025-09-02 - Last updated in NVD database

Technical Details for CVE-2025-9599

Vulnerability Analysis

This SQL Injection vulnerability stems from insufficient input sanitization in the month setup functionality of the Apartment Management System. The affected endpoint /setting/month_setup.php accepts user-supplied input through the txtMonthName parameter without proper validation or parameterized queries. When processing this input, the application directly concatenates user data into SQL statements, enabling attackers to inject arbitrary SQL commands.

The vulnerability is remotely exploitable without authentication, making it particularly dangerous for internet-facing deployments. Successful exploitation could allow attackers to read sensitive information from the database, including tenant personal data, payment records, and administrative credentials. Additionally, attackers may be able to modify or delete database records, potentially disrupting property management operations.

Root Cause

The root cause of this vulnerability is a classic CWE-74 (Injection) weakness where user-controlled input is passed directly to SQL query construction without proper sanitization or the use of parameterized queries. The txtMonthName argument in /setting/month_setup.php lacks input validation, allowing malicious SQL syntax to be interpreted as part of the database query rather than as literal string data.

Attack Vector

The attack can be executed remotely over the network. An attacker can craft malicious HTTP requests targeting the /setting/month_setup.php endpoint with specially crafted values in the txtMonthName parameter. By injecting SQL metacharacters and additional query logic, the attacker can manipulate the intended database query behavior.

The exploitation involves sending a POST or GET request to the vulnerable endpoint with a payload that escapes the intended query context. For example, an attacker could inject values designed to perform UNION-based data extraction, boolean-based blind injection, or time-based blind injection techniques to enumerate database contents.

Technical details and proof-of-concept information are available through the GitHub CVE Issue Discussion and VulDB #321773.

Detection Methods for CVE-2025-9599

Indicators of Compromise

• Unusual HTTP requests to /setting/month_setup.php containing SQL syntax characters such as single quotes, semicolons, or SQL keywords in the txtMonthName parameter
• Database error messages in application logs indicating malformed SQL queries
• Unexpected database queries accessing multiple tables or using UNION statements
• Evidence of data exfiltration or unauthorized database read operations in audit logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to /setting/month_setup.php
• Monitor application logs for SQL error messages or unexpected query behavior
• Deploy database activity monitoring to detect unusual query patterns or data access
• Review HTTP access logs for anomalous request patterns targeting the vulnerable endpoint

Monitoring Recommendations

• Enable detailed logging for the Apartment Management System application
• Configure alerts for database errors or exceptions originating from the month setup functionality
• Monitor network traffic for suspicious payloads targeting PHP endpoints
• Implement intrusion detection system (IDS) signatures for common SQL injection attack patterns

How to Mitigate CVE-2025-9599

Immediate Actions Required

• Restrict access to /setting/month_setup.php using firewall rules or application-level access controls
• Implement input validation to sanitize the txtMonthName parameter before database operations
• Consider taking the vulnerable endpoint offline if not critical to operations
• Review database logs for evidence of prior exploitation attempts

Patch Information

No official vendor patch has been identified at the time of this analysis. Organizations using this software should contact the vendor or consult the IT Source Code Overview for updates. In the absence of an official patch, implementing the workarounds below is strongly recommended.

Workarounds

• Use prepared statements or parameterized queries to handle the txtMonthName input
• Implement a Web Application Firewall (WAF) with SQL injection detection rules
• Apply input whitelisting to restrict txtMonthName to expected alphanumeric values
• Restrict network access to the application to trusted IP ranges only
• Consider deploying the application behind a reverse proxy with security filtering capabilities

# Example WAF rule to block SQL injection attempts (ModSecurity)
SecRule ARGS:txtMonthName "@detectSQLi" \
    "id:1001,\
    phase:2,\
    block,\
    msg:'SQL Injection Attempt Detected in txtMonthName',\
    logdata:'Matched Data: %{MATCHED_VAR} found within %{MATCHED_VAR_NAME}',\
    severity:'CRITICAL'"