CVE-2025-10851: Gym Management System SQLi Vulnerability

CVE-2025-10851 Overview

A SQL injection vulnerability has been identified in Campcodes Gym Management System version 1.0. The vulnerability affects the login functionality within the /ajax.php?action=login endpoint. By manipulating the Username parameter, an attacker can inject malicious SQL commands, potentially compromising the underlying database. This vulnerability is remotely exploitable without authentication, and exploit details have been publicly disclosed.

Critical Impact

Unauthenticated attackers can exploit this SQL injection vulnerability remotely to extract sensitive data, bypass authentication, or potentially compromise the entire database system.

Affected Products

• Campcodes Gym Management System 1.0

Discovery Timeline

• 2025-09-23 - CVE-2025-10851 published to NVD
• 2025-09-25 - Last updated in NVD database

Technical Details for CVE-2025-10851

Vulnerability Analysis

This SQL injection vulnerability exists in the login handler of Campcodes Gym Management System. The application fails to properly sanitize user-supplied input in the Username parameter before incorporating it into SQL queries. This classic injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) allows attackers to manipulate database queries by inserting arbitrary SQL syntax through the login form.

The vulnerability is accessible over the network without requiring any authentication or user interaction, making it particularly dangerous for internet-facing deployments. An attacker can craft malicious input containing SQL metacharacters that break out of the intended query structure, enabling unauthorized database operations.

Root Cause

The root cause of this vulnerability is improper input validation and lack of parameterized queries in the authentication mechanism. The application directly concatenates user-supplied input from the Username field into SQL statements without proper sanitization or the use of prepared statements. This allows SQL metacharacters and commands to be interpreted as part of the query logic rather than as literal string data.

Attack Vector

The attack vector is network-based, targeting the /ajax.php?action=login endpoint. An attacker sends a crafted HTTP request with a malicious Username parameter containing SQL injection payloads. Since the vulnerability exists in the login functionality, no prior authentication is required to exploit it.

The exploitation process involves injecting SQL syntax into the Username field that modifies the query behavior. Common attack techniques include using UNION-based injection to extract data from other tables, boolean-based blind injection to enumerate database contents character by character, or time-based blind injection when no direct output is visible. Successful exploitation could lead to authentication bypass, extraction of sensitive user credentials, or complete database compromise.

For detailed technical analysis, refer to the VulDB entry #325210 and the Yuque security documentation.

Detection Methods for CVE-2025-10851

Indicators of Compromise

• Unusual or malformed requests to /ajax.php?action=login containing SQL syntax characters such as single quotes, double dashes, or UNION keywords
• Database error messages appearing in web server logs or responses indicating SQL syntax errors
• Unexpected authentication successes for accounts that should not exist or with invalid credentials
• Database query logs showing anomalous SELECT statements or data extraction attempts

Detection Strategies

• Deploy Web Application Firewalls (WAF) with SQL injection detection rules to inspect requests to the /ajax.php endpoint
• Implement database activity monitoring to detect unusual query patterns, especially those containing UNION, SELECT, or comment sequences
• Configure intrusion detection systems (IDS) to alert on common SQL injection signatures in HTTP traffic
• Enable verbose logging on the database server to capture and review executed queries

Monitoring Recommendations

• Monitor web server access logs for repeated requests to /ajax.php?action=login with varying payloads
• Set up alerts for database errors related to SQL syntax violations that may indicate injection attempts
• Track failed and successful login attempts for anomalous patterns that could indicate authentication bypass
• Review application logs for evidence of automated scanning tools targeting the login endpoint

How to Mitigate CVE-2025-10851

Immediate Actions Required

• If possible, restrict network access to the Gym Management System to trusted IP addresses only
• Implement a Web Application Firewall (WAF) with SQL injection protection rules in front of the application
• Consider taking the application offline if it contains sensitive data and no workaround is available
• Audit database access logs for signs of prior exploitation

Patch Information

No official patch information is currently available from the vendor. Organizations using Campcodes Gym Management System 1.0 should monitor the Campcodes website for security updates. Given the public disclosure of this vulnerability, applying a patch immediately upon availability is strongly recommended.

Workarounds

• Implement prepared statements or parameterized queries at the application level if source code modification is possible
• Deploy a reverse proxy or WAF configured to filter SQL injection payloads in the Username parameter
• Restrict database user privileges to limit the impact of successful SQL injection attacks
• Enable network-level access controls to limit exposure of the vulnerable endpoint to trusted networks only

# Example: ModSecurity WAF rule to block basic SQL injection attempts
# Add to your ModSecurity configuration
SecRule ARGS:Username "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in Username parameter',\
    tag:'CVE-2025-10851'"