CVE-2026-30533: Online Food Ordering System SQLi Flaw

CVE-2026-30533 Overview

A SQL Injection vulnerability exists in SourceCodester Online Food Ordering System v1.0. The vulnerability is located in the admin/manage_product.php file and can be exploited through the id parameter. This flaw allows unauthenticated attackers to execute arbitrary SQL commands against the backend database, potentially leading to complete database compromise, data exfiltration, or system takeover.

Critical Impact

This SQL injection vulnerability enables attackers to bypass authentication, extract sensitive customer and administrative data, modify database records, and potentially achieve remote code execution on the underlying server.

Affected Products

• SourceCodester Online Food Ordering System v1.0
• oretnom23 online_food_ordering_system 1.0

Discovery Timeline

• 2026-03-27 - CVE-2026-30533 published to NVD
• 2026-03-30 - Last updated in NVD database

Technical Details for CVE-2026-30533

Vulnerability Analysis

This vulnerability represents a classic SQL Injection flaw (CWE-89) in a PHP-based web application. The admin/manage_product.php file fails to properly sanitize user-supplied input passed through the id parameter before incorporating it into SQL queries. This allows attackers to manipulate the query structure by injecting malicious SQL syntax.

The vulnerability is particularly severe because it exists in the administrative management interface of the food ordering system. An attacker can exploit this flaw without any authentication, enabling them to read, modify, or delete database records, extract sensitive customer information including payment details and personal data, and potentially escalate the attack to achieve command execution on the database server.

Root Cause

The root cause of this vulnerability is improper input validation and the failure to use parameterized queries or prepared statements. The application directly concatenates user input into SQL query strings without sanitization, escaping, or type validation. This is a fundamental secure coding violation that allows attackers to break out of the intended query context and inject their own SQL commands.

Attack Vector

The attack is network-based and requires no user interaction or authentication. An attacker can craft malicious HTTP requests targeting the admin/manage_product.php endpoint with specially crafted values in the id parameter. Common attack techniques include UNION-based injection to extract data from other tables, Boolean-based blind injection to infer database contents, time-based blind injection for scenarios where error messages are suppressed, and stacked queries to execute multiple SQL statements.

The vulnerability allows attackers to read sensitive data from the database, modify or delete existing records, bypass authentication mechanisms, and potentially execute operating system commands through database-specific features like xp_cmdshell (SQL Server) or INTO OUTFILE (MySQL).

For technical details and proof-of-concept information, refer to the GitHub SQL Injection PoC.

Detection Methods for CVE-2026-30533

Indicators of Compromise

• HTTP requests to admin/manage_product.php containing SQL syntax such as UNION, SELECT, OR 1=1, single quotes, or comment characters (--, #)
• Unusual database error messages in application logs indicating malformed queries
• Unexpected database queries or data access patterns in database audit logs
• Anomalous outbound data transfers from the database server

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the id parameter
• Enable database query logging and monitor for suspicious query patterns including UNION statements, multiple queries, or queries accessing system tables
• Implement intrusion detection system (IDS) signatures for SQL injection payloads targeting PHP applications
• Configure application-level logging to capture all requests to administrative endpoints

Monitoring Recommendations

• Monitor HTTP access logs for requests to admin/manage_product.php with encoded or suspicious parameter values
• Set up alerts for database errors related to syntax violations or permission denials
• Review database audit logs for queries accessing sensitive tables such as user credentials or payment information
• Implement rate limiting on administrative endpoints to slow down automated exploitation attempts

How to Mitigate CVE-2026-30533

Immediate Actions Required

• Take the Online Food Ordering System offline or restrict access to the administrative interface until remediation is complete
• Implement network-level access controls to limit who can reach the admin/manage_product.php endpoint
• Deploy a Web Application Firewall with SQL injection protection rules as an interim measure
• Review database logs and application logs for evidence of prior exploitation

Patch Information

No official vendor patch is currently available for this vulnerability. The SourceCodester Online Food Ordering System is a sample/educational project, and users should implement their own security fixes or consider using a more secure alternative.

The recommended fix involves modifying the admin/manage_product.php file to use prepared statements with parameterized queries instead of string concatenation. Additionally, implement input validation to ensure the id parameter contains only numeric values.

Workarounds

• Restrict access to the administrative directory using .htaccess rules or web server configuration to allow only trusted IP addresses
• Implement server-side input validation to reject any id parameter value containing non-numeric characters
• Use a Web Application Firewall (WAF) configured to detect and block SQL injection attempts
• Consider disabling the product management functionality until proper input sanitization can be implemented

# Example .htaccess restriction for admin directory
<Files "manage_product.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>