CVE-2026-0851: Online Music Site 1.0 SQL Injection Flaw

CVE-2026-0851 Overview

A SQL injection vulnerability has been identified in code-projects Online Music Site version 1.0. The vulnerability exists in the /Administrator/PHP/AdminAddUser.php file, where the txtusername parameter is not properly sanitized, allowing attackers to inject malicious SQL commands. This vulnerability can be exploited remotely over the network without requiring authentication, making it particularly dangerous for web applications exposed to the internet.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to manipulate database queries, potentially accessing, modifying, or deleting sensitive data stored in the application's database.

Affected Products

• code-projects Online Music Site 1.0
• PHP-based web application with MySQL backend
• /Administrator/PHP/AdminAddUser.php endpoint

Discovery Timeline

• 2026-01-12 - CVE CVE-2026-0851 published to NVD
• 2026-01-13 - Last updated in NVD database

Technical Details for CVE-2026-0851

Vulnerability Analysis

This SQL injection vulnerability stems from improper input validation in the user administration functionality of the Online Music Site application. The txtusername parameter in the AdminAddUser.php file directly concatenates user-supplied input into SQL queries without proper sanitization or parameterization. This allows attackers to break out of the intended SQL query structure and inject their own malicious SQL commands.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), specifically manifesting as a classic SQL injection flaw. The network-based attack vector with low complexity means attackers can exploit this vulnerability remotely without specialized tools or conditions.

Root Cause

The root cause of this vulnerability is the lack of input validation and parameterized queries in the AdminAddUser.php script. When processing the txtusername argument, the application fails to sanitize special SQL characters such as single quotes, double quotes, and SQL keywords. This allows user input to be interpreted as SQL syntax rather than data, enabling injection attacks.

Attack Vector

The attack can be executed remotely over the network by sending a crafted HTTP request to the vulnerable endpoint. An attacker can manipulate the txtusername parameter to inject SQL code that modifies the query's behavior. This could allow unauthorized data retrieval, modification of existing records, or execution of administrative database operations.

The vulnerability affects the application's confidentiality, integrity, and availability by potentially exposing sensitive user data, allowing unauthorized modifications to database records, and enabling denial of service through malicious queries. The exploit has been publicly documented, increasing the risk of widespread attacks.

Detection Methods for CVE-2026-0851

Indicators of Compromise

• Unusual SQL error messages appearing in application logs from the AdminAddUser.php endpoint
• HTTP requests containing SQL keywords (SELECT, UNION, INSERT, DROP) in the txtusername parameter
• Unexpected database query patterns or execution of queries outside normal application behavior
• Access attempts to administrative endpoints from untrusted IP addresses

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns in POST parameters targeting AdminAddUser.php
• Monitor application logs for SQL syntax errors and unusual query execution patterns
• Implement database activity monitoring to detect anomalous queries or unauthorized data access
• Use intrusion detection systems (IDS) with SQL injection signature detection capabilities

Monitoring Recommendations

• Enable detailed logging for all requests to the /Administrator/PHP/ directory
• Configure alerts for failed authentication attempts combined with SQL injection patterns
• Monitor database query logs for UNION-based attacks and time-based blind SQL injection attempts
• Review web server access logs for repeated requests to the vulnerable endpoint with varying payloads

How to Mitigate CVE-2026-0851

Immediate Actions Required

• Restrict access to the /Administrator/PHP/AdminAddUser.php endpoint through IP whitelisting or VPN requirements
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules
• Disable the vulnerable endpoint temporarily if user administration functionality is not critical
• Audit database permissions to limit the impact of potential SQL injection attacks

Patch Information

No official vendor patch has been identified for this vulnerability. Organizations using code-projects Online Music Site 1.0 should implement the workarounds below and consider migrating to a more actively maintained solution. For additional technical details, refer to the GitHub SQL Injection Issue and VulDB #340446.

Workarounds

• Implement prepared statements and parameterized queries for all database operations involving user input
• Add input validation to reject special characters and SQL keywords in the txtusername parameter
• Apply the principle of least privilege to database accounts used by the web application
• Consider implementing a custom input sanitization layer at the application or web server level

# Example .htaccess configuration to restrict access to admin directory
<Directory "/path/to/Administrator/PHP/">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Directory>