CVE-2025-11066: Fabian Online Bidding System SQLi Flaw

CVE-2025-11066 Overview

A SQL injection vulnerability has been discovered in code-projects Online Bidding System version 1.0. The flaw exists in the /administrator/bidlist.php file, where improper handling of the ID parameter allows attackers to inject malicious SQL queries. This vulnerability can be exploited remotely without authentication, potentially compromising the confidentiality, integrity, and availability of the underlying database.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive data, modify database records, or potentially gain unauthorized access to the bidding system's backend infrastructure.

Affected Products

• Fabian Online Bidding System 1.0
• code-projects Online Bidding System 1.0

Discovery Timeline

• 2025-09-27 - CVE CVE-2025-11066 published to NVD
• 2025-10-03 - Last updated in NVD database

Technical Details for CVE-2025-11066

Vulnerability Analysis

This SQL injection vulnerability stems from insufficient input validation in the bidlist.php administrative endpoint. When the application processes the ID parameter, it fails to properly sanitize user-supplied input before incorporating it into SQL queries. This allows attackers to manipulate the query structure and execute arbitrary SQL commands against the backend database.

The vulnerability affects the administrative bidding list functionality, which is particularly concerning as this component likely handles sensitive auction and user data. An attacker can leverage this flaw to bypass authentication checks, extract user credentials, modify bidding records, or enumerate the entire database schema.

Root Cause

The root cause of this vulnerability is classic improper input validation (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component). The application directly concatenates user-supplied input from the ID parameter into SQL queries without proper sanitization, parameterization, or use of prepared statements. This coding practice violates fundamental secure development principles and creates a direct attack surface for SQL injection attacks.

Attack Vector

The attack can be launched remotely over the network without requiring authentication. An attacker simply needs to craft a malicious HTTP request to the /administrator/bidlist.php endpoint with a specially crafted ID parameter containing SQL injection payloads. Common exploitation techniques include:

• Union-based SQL injection to extract data from other tables
• Boolean-based blind SQL injection for data exfiltration when direct output is not available
• Time-based blind SQL injection using database-specific delay functions
• Error-based injection to extract database structure information through error messages

The exploit has been publicly disclosed, increasing the risk of widespread exploitation. Technical details and proof-of-concept information are available through the GitHub Project Report and VulDB #326105.

Detection Methods for CVE-2025-11066

Indicators of Compromise

• Unusual or malformed requests to /administrator/bidlist.php containing SQL syntax in the ID parameter
• Database logs showing unexpected queries or error messages related to SQL syntax
• Web server access logs with encoded SQL injection payloads (e.g., UNION SELECT, OR 1=1, --)
• Unexpected database table access or data exfiltration patterns

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP requests
• Implement database activity monitoring to alert on anomalous query patterns or unauthorized data access
• Configure intrusion detection systems (IDS) with signatures for common SQL injection attack vectors
• Review web server and application logs for requests containing SQL keywords targeting the bidlist.php endpoint

Monitoring Recommendations

• Enable verbose logging for the Online Bidding System application, particularly for administrative endpoints
• Monitor database query logs for unusual SELECT, UNION, or INSERT statements originating from the web application
• Set up alerts for multiple failed authentication attempts or database errors that may indicate active exploitation
• Implement real-time log analysis to detect SQL injection attempt patterns

How to Mitigate CVE-2025-11066

Immediate Actions Required

• Restrict access to the /administrator/bidlist.php endpoint using IP whitelisting or VPN requirements
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules in front of the application
• If the system is publicly accessible and non-critical, consider taking it offline until a patch is available
• Review database permissions to ensure the application uses a least-privilege database account

Patch Information

As of the last NVD update on 2025-10-03, no official vendor patch has been released for this vulnerability. System administrators should monitor the Code Projects website for security updates. Given that this is a code-projects educational project, organizations using this software in production environments should consider migrating to a more actively maintained bidding platform.

Workarounds

• Implement input validation at the application level by sanitizing the ID parameter to accept only numeric values
• Use prepared statements or parameterized queries if modifying the source code is feasible
• Deploy network-level controls to restrict access to the administrative interface
• Consider implementing a reverse proxy with ModSecurity or similar WAF capabilities to filter malicious requests

# Example: Apache .htaccess rule to restrict access to admin directory
<Directory "/var/www/html/administrator">
    # Allow only internal network access
    Require ip 192.168.1.0/24
    Require ip 10.0.0.0/8
    
    # Deny all other access
    Require all denied
</Directory>