CVE-2025-4899: Campcodes Sales Inventory System SQLi Flaw

CVE-2025-4899 Overview

A critical SQL injection vulnerability has been identified in Campcodes Sales and Inventory System version 1.0. The vulnerability exists in the file /pages/transaction_update.php, where the manipulation of the ID parameter allows attackers to inject malicious SQL queries. This flaw can be exploited remotely without authentication, potentially allowing unauthorized access to sensitive database information, data manipulation, or complete database compromise.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to access, modify, or delete sensitive business data including sales records, inventory information, and potentially customer data stored in the backend database.

Affected Products

• Campcodes Sales and Inventory System 1.0

Discovery Timeline

• 2025-05-18 - CVE-2025-4899 published to NVD
• 2025-05-21 - Last updated in NVD database

Technical Details for CVE-2025-4899

Vulnerability Analysis

This vulnerability is classified under CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The flaw resides in the transaction update functionality of the Sales and Inventory System, specifically within the /pages/transaction_update.php file.

The vulnerability allows remote attackers to inject arbitrary SQL commands through the ID parameter. Since the application fails to properly sanitize user-supplied input before incorporating it into SQL queries, attackers can craft malicious requests that manipulate database operations. The exploit has been publicly disclosed, increasing the risk of active exploitation in the wild.

Root Cause

The root cause of this vulnerability is improper input validation and lack of parameterized queries in the transaction_update.php file. The application directly concatenates user-supplied data from the ID parameter into SQL statements without proper sanitization or the use of prepared statements. This classic SQL injection pattern allows attackers to break out of the intended query structure and inject their own SQL commands.

Attack Vector

The attack can be initiated remotely over the network without requiring authentication. An attacker can craft HTTP requests to /pages/transaction_update.php with a malicious payload in the ID parameter. The injected SQL code executes with the privileges of the database user configured for the application.

Typical exploitation scenarios include:

• Data Exfiltration: Using UNION-based or blind SQL injection techniques to extract sensitive data from the database
• Authentication Bypass: Manipulating queries to bypass login mechanisms
• Data Manipulation: Modifying or deleting inventory and sales records
• Privilege Escalation: Accessing administrative functions through database manipulation

For detailed technical information on the exploit mechanism, refer to the GitHub CVE Issue Discussion and VulDB #309455.

Detection Methods for CVE-2025-4899

Indicators of Compromise

• Unusual or malformed HTTP requests to /pages/transaction_update.php containing SQL syntax characters such as single quotes, double dashes, or UNION keywords in the ID parameter
• Database error messages appearing in web server logs indicating SQL syntax errors
• Unexpected database queries accessing multiple tables or using UNION statements in database query logs
• Anomalous outbound network traffic from the database server that may indicate data exfiltration

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns targeting the /pages/transaction_update.php endpoint
• Configure intrusion detection systems (IDS) to alert on HTTP requests containing SQL injection payloads in URL parameters
• Enable and monitor database audit logs for suspicious query patterns including UNION SELECT statements, time-based functions, or error-based injection attempts
• Implement application-level logging to capture and analyze all requests to transaction-related endpoints

Monitoring Recommendations

• Establish baseline behavior for normal application database queries and alert on deviations
• Monitor for multiple rapid requests to /pages/transaction_update.php with varying ID values, which may indicate automated exploitation attempts
• Review web server access logs regularly for requests containing encoded SQL injection payloads
• Configure real-time alerting for database errors that may indicate injection attempts

How to Mitigate CVE-2025-4899

Immediate Actions Required

• Restrict access to /pages/transaction_update.php to authenticated and authorized users only
• Implement input validation on the ID parameter to accept only expected numeric values
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules as an immediate defensive layer
• Consider temporarily disabling the affected transaction update functionality until a patch is available

Patch Information

As of the last NVD update on 2025-05-21, no official patch has been released by Campcodes. Organizations using this software should monitor the CampCodes website for security updates and patches. In the absence of an official patch, implementing the workarounds and compensating controls described below is strongly recommended.

Workarounds

• Implement server-side input validation to ensure the ID parameter contains only numeric values before processing
• Use prepared statements with parameterized queries in the affected PHP file to prevent SQL injection
• Apply the principle of least privilege to the database user account used by the application
• Segment the network to limit database server exposure and restrict access to application servers only
• Consider implementing database activity monitoring to detect and block malicious query execution

# Example: Restrict access to vulnerable endpoint using Apache .htaccess
# Add to /pages/.htaccess or main Apache configuration
<Files "transaction_update.php">
    # Require authentication
    AuthType Basic
    AuthName "Restricted Access"
    AuthUserFile /etc/apache2/.htpasswd
    Require valid-user
    
    # Additional IP restriction (adjust to your network)
    Order deny,allow
    Deny from all
    Allow from 192.168.1.0/24
</Files>