CVE-2025-4485: Admerc Gym Management System SQLi Flaw

CVE-2025-4485 Overview

A critical SQL injection vulnerability has been identified in itsourcecode Gym Management System version 1.0. This vulnerability exists in the /ajax.php?action=delete_trainer endpoint, where improper handling of the ID parameter allows attackers to inject malicious SQL commands. The attack can be initiated remotely without authentication, potentially allowing unauthorized access to the database, data manipulation, or complete database compromise.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to read, modify, or delete sensitive data from the Gym Management System database, potentially compromising member information, financial records, and administrative credentials.

Affected Products

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

Discovery Timeline

• May 9, 2025 - CVE-2025-4485 published to NVD
• December 22, 2025 - Last updated in NVD database

Technical Details for CVE-2025-4485

Vulnerability Analysis

This SQL injection vulnerability exists due to insufficient input validation in the trainer deletion functionality of the Gym Management System. The application fails to properly sanitize or parameterize user-supplied input in the ID parameter before incorporating it into SQL queries. This allows attackers to manipulate the query logic and execute arbitrary SQL statements against the underlying database.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection flaws where untrusted data is sent to an interpreter as part of a command or query. The exploit has been publicly disclosed, increasing the risk of exploitation in the wild.

Root Cause

The root cause of this vulnerability is the direct concatenation of user-supplied input into SQL queries without proper sanitization or the use of prepared statements. The ID parameter in the delete_trainer action is passed directly to the database query without validation, allowing special SQL characters and commands to be injected. This represents a fundamental failure in secure coding practices where input validation and parameterized queries should have been implemented.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests to the /ajax.php?action=delete_trainer endpoint with a manipulated ID parameter containing SQL injection payloads. Common exploitation techniques include:

The vulnerability allows attackers to append malicious SQL syntax to the legitimate ID value. By injecting commands such as UNION SELECT statements or boolean-based blind injection techniques, attackers can extract sensitive information including user credentials, member personal data, and system configuration details. Time-based blind injection methods can also be employed to exfiltrate data even when direct output is not visible.

For technical details and proof-of-concept information, refer to the GitHub CVE Issue Discussion and the VulDB CVE Analysis #308200.

Detection Methods for CVE-2025-4485

Indicators of Compromise

• Unusual database queries in logs containing SQL keywords like UNION, SELECT, DROP, or -- comment markers in the ID parameter
• Unexpected HTTP requests to /ajax.php?action=delete_trainer with non-numeric or malformed ID values
• Database error messages appearing in application logs indicating syntax errors or failed queries
• Unexplained changes to trainer records or database schema modifications

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in request parameters targeting the /ajax.php endpoint
• Configure intrusion detection systems to alert on requests containing common SQL injection payloads such as single quotes, UNION, OR 1=1, and similar patterns
• Enable detailed database query logging and monitor for anomalous query patterns or excessive failed queries
• Deploy application-level logging to track all requests to administrative endpoints including trainer management functions

Monitoring Recommendations

• Establish baseline traffic patterns for the Gym Management System and alert on deviations, particularly to administrative endpoints
• Monitor database performance metrics for unusual spikes in query execution time that may indicate time-based blind SQL injection attempts
• Review web server access logs regularly for suspicious patterns in the ID parameter of requests to /ajax.php
• Implement real-time alerting for any database errors related to SQL syntax in the trainer management module

How to Mitigate CVE-2025-4485

Immediate Actions Required

• Take the Gym Management System offline or restrict network access until patches can be applied
• Review database logs and backup data to assess potential compromise
• Implement WAF rules to block requests to /ajax.php?action=delete_trainer containing non-numeric characters in the ID parameter
• Rotate 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 should contact the vendor or review the IT Source Code Resources for updates. Given the public disclosure of this exploit and the absence of an official fix, organizations should prioritize implementing workarounds and consider replacing the affected software with a secure alternative.

Workarounds

• Implement input validation at the application level to ensure the ID parameter only accepts numeric values before processing
• Deploy a reverse proxy or WAF configured to sanitize or reject requests with SQL injection patterns
• Restrict access to the /ajax.php endpoint to authenticated administrative users only, implementing IP-based access controls where feasible
• If source code access is available, modify the vulnerable code to use prepared statements or parameterized queries for all database interactions

# Example WAF rule for ModSecurity to block SQL injection in ID parameter
SecRule ARGS:ID "!@rx ^[0-9]+$" \
    "id:100001,phase:2,deny,status:403,log,msg:'SQL Injection attempt blocked in delete_trainer ID parameter'"