CVE-2025-4487: Gym Management System SQLi Vulnerability

CVE-2025-4487 Overview

A critical SQL injection vulnerability has been identified in itsourcecode Gym Management System version 1.0. The vulnerability exists within the /ajax.php?action=delete_member endpoint, where improper handling of the ID parameter allows attackers to inject malicious SQL queries. This flaw enables remote attackers to manipulate database queries without authentication, potentially leading to unauthorized data access, modification, or deletion of sensitive gym member information.

Critical Impact

This SQL injection vulnerability allows unauthenticated remote attackers to execute arbitrary SQL commands against the backend database, potentially compromising all stored member data and administrative credentials.

Affected Products

• Admerc Gym Management System 1.0
• itsourcecode Gym Management System 1.0

Discovery Timeline

• 2025-05-09 - CVE-2025-4487 published to NVD
• 2025-12-22 - Last updated in NVD database

Technical Details for CVE-2025-4487

Vulnerability Analysis

This SQL injection vulnerability occurs due to insufficient input validation in the member deletion functionality. The application fails to properly sanitize or parameterize the ID argument before incorporating it into SQL queries. When a request is made to the /ajax.php?action=delete_member endpoint, the ID parameter value is directly concatenated into the SQL statement, creating an injection point that attackers can exploit remotely without requiring any authentication or user interaction.

The vulnerability affects the core data management functionality of the gym management system, making it particularly dangerous as it could allow attackers to extract sensitive member information including personal details, payment records, and login credentials stored in the database.

Root Cause

The root cause of this vulnerability is the absence of proper input sanitization and the use of insecure dynamic SQL query construction. The application directly incorporates user-supplied input from the ID parameter into database queries without utilizing prepared statements or parameterized queries. This classic SQL injection pattern (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) allows malicious SQL code to be interpreted and executed by the database engine.

Attack Vector

The attack can be launched remotely over the network against any exposed instance of the Gym Management System. An attacker can craft a malicious HTTP request to the /ajax.php?action=delete_member endpoint with a specially crafted ID parameter containing SQL injection payloads. The vulnerability requires no authentication, no privileges, and no user interaction to exploit, making it accessible to any attacker who can reach the application over the network.

Typical exploitation involves injecting SQL commands through the ID parameter to enumerate database contents, extract sensitive data, modify records, or potentially gain further access to the underlying system. The exploit has been publicly disclosed, increasing the risk of widespread exploitation.

Detection Methods for CVE-2025-4487

Indicators of Compromise

• Unusual HTTP requests to /ajax.php?action=delete_member containing SQL syntax characters such as single quotes, double dashes, semicolons, or UNION keywords
• Database error messages in application logs indicating malformed SQL queries
• Unexpected database query patterns or high volumes of requests to the delete_member endpoint
• Evidence of data exfiltration or unauthorized database modifications in audit logs

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SQL injection patterns in requests to /ajax.php
• Configure intrusion detection systems (IDS) to alert on traffic containing common SQL injection payloads targeting the vulnerable endpoint
• Monitor application and database logs for SQL syntax errors or anomalous query execution patterns
• Deploy runtime application self-protection (RASP) solutions to identify injection attempts at the application layer

Monitoring Recommendations

• Enable detailed logging for all requests to the /ajax.php endpoint and review logs regularly for suspicious patterns
• Set up alerts for repeated requests to the delete_member action from the same source IP
• Monitor database query execution logs for unexpected or unauthorized data access attempts
• Implement network traffic analysis to detect potential data exfiltration following successful exploitation

How to Mitigate CVE-2025-4487

Immediate Actions Required

• Take the Gym Management System offline or restrict access to trusted networks only until a patch can be applied
• Implement web application firewall rules to block requests containing SQL injection patterns to the /ajax.php endpoint
• Review database logs for evidence of prior exploitation and assess the integrity of stored data
• Change all database credentials and administrative passwords as a precautionary measure

Patch Information

No official vendor patch has been released for this vulnerability at the time of publication. Organizations using the affected Gym Management System 1.0 should contact the vendor through IT Source Code for remediation guidance. In the absence of an official patch, consider implementing the workarounds below or migrating to a more secure alternative solution.

For additional technical details about this vulnerability, refer to the GitHub CVE Issue Discussion and VulDB #308202.

Workarounds

• Implement input validation on the server side to ensure the ID parameter contains only numeric values before processing
• Modify the vulnerable code to use prepared statements or parameterized queries for all database operations
• Deploy a web application firewall to filter malicious requests before they reach the application
• Restrict network access to the application to only authorized internal users or trusted IP ranges
• Consider disabling the member deletion functionality until a proper fix can be implemented

# Example WAF rule to block SQL injection attempts (ModSecurity)
SecRule ARGS:ID "(?i)(\b(union|select|insert|update|delete|drop|alter|create)\b|--|;|')" \
    "id:100001,phase:2,deny,status:403,msg:'SQL Injection Attempt Blocked'"