CVE-2025-9610: Carmelo Event Judging System SQLi Flaw

CVE-2025-9610 Overview

A SQL injection vulnerability has been identified in Carmelo Online Event Judging System version 1.0. The vulnerability exists in the /create_account.php file and specifically affects the fname parameter. By manipulating this input parameter, an attacker can inject malicious SQL commands that are executed by the underlying database engine. The vulnerability is remotely exploitable without authentication, making it accessible to any network-based attacker. Additionally, the disclosure notes that other parameters in the affected component might also be susceptible to similar injection attacks.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data from the database, modify or delete records, and potentially achieve further system compromise through database-level access.

Affected Products

• Carmelo Online Event Judging System 1.0
• /create_account.php endpoint
• fname parameter (and potentially other parameters)

Discovery Timeline

• 2025-08-29 - CVE-2025-9610 published to NVD
• 2025-11-13 - Last updated in NVD database

Technical Details for CVE-2025-9610

Vulnerability Analysis

This vulnerability is classified under 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). The affected component, /create_account.php, fails to properly sanitize user-supplied input in the fname parameter before incorporating it into SQL queries. This allows attackers to inject arbitrary SQL syntax that gets executed with the privileges of the database user configured for the application.

The vulnerability is particularly concerning because it exists in an account creation endpoint, which is typically publicly accessible and doesn't require authentication. This means any remote attacker can attempt exploitation without needing prior access to the system. The exploit has been publicly disclosed, increasing the risk of widespread exploitation attempts.

Root Cause

The root cause of this vulnerability is insufficient input validation and sanitization in the account creation functionality. The application directly concatenates user-supplied input from the fname parameter into SQL queries without using parameterized queries, prepared statements, or proper escaping mechanisms. This is a classic example of trusting user input, which allows attackers to break out of the intended data context and inject SQL commands.

Attack Vector

The attack is network-based and can be carried out remotely against any exposed instance of the Online Event Judging System. An attacker would submit a crafted HTTP request to the /create_account.php endpoint with malicious SQL syntax in the fname parameter. Depending on the database configuration and application behavior, the attacker could:

1. Extract sensitive information from database tables using UNION-based or blind SQL injection techniques
2. Bypass authentication mechanisms by manipulating query logic
3. Modify or delete database records
4. Potentially execute operating system commands if database features like xp_cmdshell (SQL Server) or LOAD_FILE (MySQL) are available

The vulnerability mechanism involves the unsanitized fname parameter being concatenated into SQL queries. For detailed technical information about the exploitation method, refer to the GitHub CVE Issue Tracker and VulDB #321788.

Detection Methods for CVE-2025-9610

Indicators of Compromise

• Unusual HTTP requests to /create_account.php containing SQL metacharacters such as single quotes, double dashes, semicolons, or SQL keywords like UNION, SELECT, INSERT, DROP
• Database error messages in application logs indicating malformed SQL queries
• Unexpected database queries appearing in database audit logs, particularly those with injection patterns
• Anomalous account creation activity or database modifications without corresponding legitimate user actions

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SQL injection patterns in requests to /create_account.php
• Configure intrusion detection systems (IDS) to alert on HTTP traffic containing common SQL injection payloads targeting the fname parameter
• Enable detailed database query logging and monitor for unusual query patterns or syntax errors
• Deploy application-layer monitoring to track requests to the affected endpoint and flag suspicious input patterns

Monitoring Recommendations

• Continuously monitor web server access logs for repeated requests to /create_account.php with varying parameter values indicative of fuzzing or injection attempts
• Set up alerts for database errors that may indicate attempted SQL injection exploitation
• Review database audit trails for unauthorized data access or modification attempts
• Implement rate limiting on the account creation endpoint to slow down automated exploitation attempts

How to Mitigate CVE-2025-9610

Immediate Actions Required

• If possible, restrict network access to the Online Event Judging System to trusted networks only until a patch is available
• Implement a web application firewall with SQL injection detection rules to filter malicious requests
• Review and audit the application code for all user input handling, particularly in /create_account.php
• Consider temporarily disabling the account creation functionality if it is not critical to operations

Patch Information

As of the last update (2025-11-13), no official vendor patch has been publicly documented for this vulnerability. Organizations using Carmelo Online Event Judging System 1.0 should monitor the Code Projects Security Resources for updates. Given the nature of this project, users may need to apply manual code fixes to address the SQL injection vulnerability by implementing proper input validation and parameterized queries.

Workarounds

• Deploy a web application firewall (WAF) configured with SQL injection protection rules in front of the application
• Modify the application code to use parameterized queries or prepared statements for all database interactions involving user input
• Implement strict input validation on the fname parameter and all other user-controllable inputs, rejecting characters commonly used in SQL injection attacks
• Restrict database user privileges to the minimum necessary, preventing destructive operations even if injection occurs

# Example WAF rule concept for ModSecurity to block SQL injection attempts
# Add to your ModSecurity configuration
SecRule ARGS:fname "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in fname parameter',\
    tag:'application-multi',\
    tag:'language-multi',\
    tag:'platform-multi',\
    tag:'attack-sqli'"