CVE-2025-4362: Gym Management System SQL Injection Flaw

CVE-2025-4362 Overview

A SQL injection vulnerability has been identified in itsourcecode Gym Management System version 1.0. This vulnerability exists in the /ajax.php?action=save_membership endpoint, where improper handling of the member_id parameter allows attackers to inject malicious SQL queries. The vulnerability can be exploited remotely without authentication, potentially allowing unauthorized access to the underlying database and its contents.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive member data, modify database records, or potentially compromise the entire database server through the vulnerable membership management endpoint.

Affected Products

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

Discovery Timeline

• 2025-05-06 - CVE-2025-4362 published to NVD
• 2025-12-31 - Last updated in NVD database

Technical Details for CVE-2025-4362

Vulnerability Analysis

This SQL injection vulnerability occurs when user-supplied input through the member_id parameter is passed directly to SQL queries without proper sanitization or parameterization. The vulnerable endpoint /ajax.php?action=save_membership processes membership data, and the lack of input validation allows attackers to break out of the intended SQL query structure and execute arbitrary database commands.

The vulnerability is accessible over the network and requires no user interaction or prior authentication, making it particularly dangerous for internet-facing deployments. An attacker can craft malicious requests to extract sensitive member information, modify membership records, or potentially escalate the attack to gain broader system access depending on the database configuration and privileges.

Root Cause

The root cause of this vulnerability is the failure to properly sanitize or parameterize user input before incorporating it into SQL queries. The member_id parameter is directly concatenated into SQL statements without using prepared statements, parameterized queries, or adequate input validation. This is a classic example of CWE-89 (Improper Neutralization of Special Elements used in an SQL Command) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Attack Vector

The attack can be initiated remotely through HTTP requests to the vulnerable endpoint. An attacker sends a crafted request to /ajax.php?action=save_membership with a malicious payload in the member_id parameter. The injection payload can include SQL commands to:

1. Extract data from the database using UNION-based or blind SQL injection techniques
2. Modify or delete existing records
3. Bypass authentication mechanisms
4. Potentially execute system commands if database permissions allow

The vulnerability has been publicly disclosed, meaning exploit techniques may be widely available to threat actors. Technical details and proof of concept information can be found in the GitHub CVE Issue Tracker and VulDB #307486.

Detection Methods for CVE-2025-4362

Indicators of Compromise

• Unusual database query patterns or errors in web server logs referencing /ajax.php?action=save_membership
• HTTP requests to the vulnerable endpoint containing SQL syntax characters such as single quotes, double dashes, or UNION keywords in the member_id parameter
• Database audit logs showing unexpected queries or data extraction attempts
• Anomalous access patterns to member data tables

Detection Strategies

• Implement web application firewall (WAF) rules to detect SQL injection patterns in requests to /ajax.php
• Monitor web server access logs for suspicious requests containing SQL metacharacters in query parameters
• Deploy database activity monitoring to detect anomalous query patterns or unauthorized data access
• Configure intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging for the Gym Management System application and review logs regularly for injection attempts
• Set up alerts for database errors that may indicate failed SQL injection attempts
• Monitor for unusual data exfiltration patterns from member-related database tables
• Implement real-time monitoring of HTTP requests to critical application endpoints

How to Mitigate CVE-2025-4362

Immediate Actions Required

• Restrict network access to the Gym Management System to trusted IP addresses only
• Implement a web application firewall (WAF) with SQL injection protection rules
• Review and audit database user permissions to ensure principle of least privilege
• Consider taking the application offline if it handles sensitive data until a patch is applied

Patch Information

No official vendor patch has been identified for this vulnerability at the time of this advisory. Organizations using itsourcecode Gym Management System should contact the vendor or check IT Source Code for security updates. Given the publicly disclosed nature of this vulnerability, applying mitigations is critical.

For technical details and ongoing tracking, refer to VulDB CTI Report #307486.

Workarounds

• Implement input validation on the member_id parameter to accept only numeric values
• Use prepared statements or parameterized queries in the application code to prevent SQL injection
• Deploy a reverse proxy or WAF in front of the application to filter malicious requests
• Isolate the database server from direct internet access and restrict database user privileges

# Example WAF rule for ModSecurity to block SQL injection in member_id parameter
SecRule ARGS:member_id "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in member_id parameter',\
    tag:'attack-sqli'"