CVE-2025-4466: Gym Management System SQLi Vulnerability

CVE-2025-4466 Overview

A critical SQL injection vulnerability has been identified in itsourcecode Gym Management System version 1.0. The vulnerability exists in the file /ajax.php?action=save_payment, where improper handling of the registration_id argument allows attackers to inject malicious SQL statements. This flaw can be exploited remotely without authentication, potentially enabling unauthorized database access, data manipulation, and information disclosure.

Critical Impact

Unauthenticated attackers can exploit this SQL injection vulnerability remotely to extract sensitive data, modify database records, or potentially gain further access to the underlying system.

Affected Products

• Admerc Gym Management System 1.0

Discovery Timeline

• 2025-05-09 - CVE CVE-2025-4466 published to NVD
• 2025-12-22 - Last updated in NVD database

Technical Details for CVE-2025-4466

Vulnerability Analysis

This vulnerability represents a classic SQL injection flaw stemming from insufficient input validation in a web application payment processing endpoint. The registration_id parameter in the /ajax.php?action=save_payment endpoint accepts user-supplied input that is directly incorporated into SQL queries without proper sanitization or parameterization.

When a user submits payment information through this endpoint, the application fails to validate or escape the registration_id value before constructing database queries. This allows an attacker to craft malicious input that breaks out of the intended query structure and executes arbitrary SQL commands. The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection flaws.

The network-accessible nature of this vulnerability significantly increases its risk profile, as attackers can exploit it remotely without requiring local access or prior authentication to the system.

Root Cause

The root cause of this vulnerability lies in the application's failure to implement proper input validation and parameterized queries for the registration_id parameter. The PHP code handling the save_payment action in ajax.php directly concatenates user input into SQL query strings rather than using prepared statements or input sanitization mechanisms. This coding practice violates fundamental secure development principles and creates a direct path for SQL injection attacks.

Attack Vector

The attack can be initiated remotely over the network by sending crafted HTTP requests to the vulnerable endpoint. An attacker would target the /ajax.php?action=save_payment endpoint and manipulate the registration_id parameter with SQL injection payloads. Common attack techniques include using single quotes to escape string contexts, UNION-based injection to extract data from other tables, or time-based blind injection to infer database contents when direct output is not available.

The vulnerability allows attackers to potentially read sensitive member data, financial records, and authentication credentials stored in the database. In more severe scenarios, attackers might be able to modify or delete records, or leverage database functionality to execute operating system commands depending on the database configuration and privileges.

For technical details on this vulnerability, refer to the GitHub Issue Discussion and the VulDB advisory.

Detection Methods for CVE-2025-4466

Indicators of Compromise

• Unusual HTTP POST requests to /ajax.php?action=save_payment containing SQL syntax characters such as single quotes, UNION statements, or comment sequences
• Database error messages appearing in application logs or responses indicating malformed SQL queries
• Unexpected database query patterns or access to tables beyond normal application scope
• Evidence of data exfiltration or unauthorized database modifications in audit logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in the registration_id parameter
• Monitor application and database logs for error messages indicating SQL syntax errors or injection attempts
• Deploy intrusion detection systems (IDS) with signatures for SQL injection attack patterns
• Conduct regular security scans of web applications to identify injection vulnerabilities

Monitoring Recommendations

• Enable detailed logging for all requests to the /ajax.php endpoint, capturing full request parameters
• Configure database audit logging to track unusual query patterns or unauthorized table access
• Set up alerts for multiple failed database queries originating from the same source in short time periods
• Monitor for data exfiltration patterns such as large result sets or access to sensitive tables

How to Mitigate CVE-2025-4466

Immediate Actions Required

• Remove or disable the Gym Management System from production environments until patched
• Implement network-level access controls to restrict access to the vulnerable endpoint
• Deploy WAF rules to filter SQL injection attempts targeting the registration_id parameter
• Review database logs for signs of prior exploitation and assess potential data compromise

Patch Information

No official vendor patch information is currently available for this vulnerability. Organizations using the affected Gym Management System 1.0 should contact the vendor for remediation guidance or consider alternative solutions. The vulnerability details have been publicly disclosed on VulDB.

Workarounds

• Implement input validation at the application or WAF level to reject non-numeric values in the registration_id parameter
• Use a reverse proxy to filter malicious requests before they reach the application
• Restrict database user privileges to limit potential damage from successful exploitation
• Consider isolating the application in a segmented network zone with restricted database access
• If source code access is available, implement prepared statements or parameterized queries for the vulnerable endpoint

# Example: WAF rule to block SQL injection in registration_id parameter
# Add to web server or WAF configuration
# Block requests containing common SQL injection patterns
SecRule ARGS:registration_id "@rx (?i)(\b(union|select|insert|update|delete|drop|alter|create|truncate)\b|--|;|'|\")" \
    "id:100001,phase:2,deny,status:403,msg:'SQL Injection attempt blocked in registration_id'"