CVE-2025-6904 Overview
A critical SQL injection vulnerability has been identified in code-projects Car Rental System version 1.0. The vulnerability exists in the /admin/add_cars.php file, where the car_name argument is improperly handled, allowing attackers to inject malicious SQL commands. This flaw can be exploited remotely without authentication, potentially compromising the entire database and underlying system.
Critical Impact
Remote attackers can exploit this SQL injection vulnerability to manipulate database queries, potentially extracting sensitive data, modifying records, or gaining unauthorized administrative access to the Car Rental System.
Affected Products
- Anisha Car Rental System 1.0
- code-projects Car Rental System 1.0
Discovery Timeline
- 2025-06-30 - CVE-2025-6904 published to NVD
- 2025-07-11 - Last updated in NVD database
Technical Details for CVE-2025-6904
Vulnerability Analysis
This SQL injection vulnerability occurs due to insufficient input validation in the car management functionality of the Car Rental System. When administrators add new vehicles through the /admin/add_cars.php endpoint, the car_name parameter is directly incorporated into SQL queries without proper sanitization or parameterization. This allows attackers 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 vulnerabilities where user-controlled input is improperly handled before being used in sensitive operations.
Root Cause
The root cause of this vulnerability is the lack of prepared statements or parameterized queries in the PHP code handling the car_name input. When user-supplied data is concatenated directly into SQL query strings without escaping special characters, it creates an opportunity for SQL injection attacks. This represents a fundamental failure to implement secure coding practices for database interactions.
Attack Vector
The attack can be launched remotely over the network without requiring authentication. An attacker can target the /admin/add_cars.php endpoint and inject SQL payloads through the car_name parameter. The exploit has been publicly disclosed, making it accessible to threat actors. Successful exploitation could allow attackers to:
- Extract sensitive customer and booking data from the database
- Modify or delete database records
- Bypass authentication mechanisms
- Potentially escalate privileges within the application
- In some configurations, execute operating system commands through database features
The vulnerability manifests in the car name input field where malicious SQL syntax can be injected. For detailed technical analysis, refer to the GitHub Issue on CVE and VulDB #314396.
Detection Methods for CVE-2025-6904
Indicators of Compromise
- Unusual SQL error messages in application or web server logs
- Unexpected database queries containing SQL keywords like UNION, SELECT, DROP, or -- in the car_name field
- Anomalous access patterns to /admin/add_cars.php with suspicious payloads
- Database audit logs showing unauthorized data access or modification
- Application crashes or unexpected behavior during vehicle addition operations
Detection Strategies
- Implement web application firewall (WAF) rules to detect SQL injection patterns in HTTP requests
- Enable detailed logging on the web server and database to capture suspicious query patterns
- Deploy intrusion detection systems (IDS) with signatures for common SQL injection payloads
- Monitor application logs for SQL syntax errors or database exception messages
- Use database activity monitoring tools to flag unusual query structures
Monitoring Recommendations
- Configure real-time alerting for SQL error patterns in application logs
- Set up database query auditing to track queries originating from the car management module
- Monitor network traffic for payloads containing SQL injection indicators targeting /admin/add_cars.php
- Establish baseline behavior for database interactions and alert on deviations
How to Mitigate CVE-2025-6904
Immediate Actions Required
- Restrict access to the /admin/add_cars.php endpoint through network-level controls or authentication mechanisms
- Deploy a web application firewall (WAF) with SQL injection protection rules
- Review and audit all database-facing code in the Car Rental System for similar vulnerabilities
- Consider temporarily disabling the car addition functionality until a proper fix is implemented
- Back up the database and monitor for signs of exploitation
Patch Information
As of the last modification date (2025-07-11), no official vendor patch has been released for this vulnerability. Users of the Anisha Car Rental System should monitor the Code Projects Resource Hub for security updates. In the absence of an official patch, organizations should implement the workarounds described below and consider migrating to a more actively maintained car rental management solution.
Workarounds
- Implement input validation to reject special SQL characters in the car_name parameter
- Use prepared statements with parameterized queries for all database operations
- Apply the principle of least privilege to database accounts used by the application
- Deploy a web application firewall to filter malicious requests before they reach the application
- Segment the network to limit access to administrative endpoints like /admin/add_cars.php
# Example: Restrict access to admin endpoint using Apache .htaccess
# Add to .htaccess in the /admin directory
<Files "add_cars.php">
Require ip 192.168.1.0/24
# Only allow access from trusted internal network
</Files>
# Enable mod_security with SQL injection rules
# In Apache configuration:
# SecRuleEngine On
# SecRule ARGS "@detectSQLi" "id:1,deny,status:403,msg:'SQL Injection Detected'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
