CVE-2025-13203: Simple Cafe Ordering System SQLi Flaw

CVE-2025-13203 Overview

A SQL injection vulnerability has been identified in Fabian Simple Cafe Ordering System 1.0. This vulnerability affects code within the file /addmem.php, where manipulation of the studentnum argument can lead to SQL injection attacks. The vulnerability is remotely exploitable, and exploit details have been made publicly available, increasing the risk of exploitation in the wild.

Critical Impact

Unauthenticated remote attackers can exploit this SQL injection vulnerability to compromise database integrity, extract sensitive information, or manipulate application data through the /addmem.php endpoint.

Affected Products

• Fabian Simple Cafe Ordering System 1.0

Discovery Timeline

• 2025-11-15 - CVE-2025-13203 published to NVD
• 2025-11-19 - Last updated in NVD database

Technical Details for CVE-2025-13203

Vulnerability Analysis

This vulnerability represents a classic SQL injection flaw (CWE-89) combined with a more general injection weakness (CWE-74). The vulnerable endpoint /addmem.php fails to properly sanitize or parameterize the studentnum input parameter before incorporating it into SQL queries. This allows attackers to inject malicious SQL statements that are then executed by the database engine with the same privileges as the application.

The network-accessible nature of this vulnerability means that any attacker with network access to the application can attempt exploitation without requiring authentication or user interaction. Successful exploitation could result in unauthorized access to confidential data, modification or deletion of database records, and potential lateral movement within the hosting infrastructure.

Root Cause

The root cause of this vulnerability is improper input validation and the use of unsanitized user input directly in SQL queries. The studentnum parameter in /addmem.php is not properly sanitized, validated, or handled through parameterized queries (prepared statements), allowing attackers to inject arbitrary SQL commands. This is a fundamental secure coding failure where user-controlled input is trusted and concatenated directly into database queries.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests to the /addmem.php endpoint with specially crafted payloads in the studentnum parameter. These payloads can include SQL injection techniques such as UNION-based injection, boolean-based blind injection, or time-based blind injection to extract data, bypass authentication, or modify database contents.

The vulnerability is exploited by sending malicious values through the studentnum parameter that escape the intended SQL query context. For example, an attacker might submit values containing SQL metacharacters like single quotes, comment sequences, or UNION statements to manipulate the query logic. Detailed technical information about this vulnerability can be found in the GitHub Issue Discussion and the VulDB entry.

Detection Methods for CVE-2025-13203

Indicators of Compromise

• Unusual or malformed requests to /addmem.php containing SQL metacharacters (single quotes, semicolons, comment sequences like -- or /**/)
• Database error messages in application logs indicating SQL syntax errors or injection attempts
• Unexpected database query patterns or queries accessing tables beyond normal application scope
• Evidence of data exfiltration or unauthorized data access in database audit logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the studentnum parameter
• Monitor HTTP request logs for suspicious payloads containing SQL keywords such as UNION, SELECT, INSERT, UPDATE, DELETE, or DROP
• Enable database query logging and alert on anomalous query patterns or syntax errors
• Deploy intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Enable verbose logging for the /addmem.php endpoint and review logs for anomalous input patterns
• Configure real-time alerts for SQL error messages that may indicate injection attempts
• Monitor database activity for unusual read/write operations or access to sensitive tables
• Implement application performance monitoring to detect abnormal query execution times that may indicate time-based blind SQL injection

How to Mitigate CVE-2025-13203

Immediate Actions Required

• Remove or restrict access to the vulnerable Simple Cafe Ordering System if it is publicly exposed
• Implement input validation on the studentnum parameter to accept only expected numeric formats
• Deploy a Web Application Firewall (WAF) with SQL injection protection as a temporary mitigation
• Review database user privileges to ensure the application uses least-privilege access

Patch Information

As of the last update on 2025-11-19, no official vendor patch has been released for this vulnerability. Organizations using the affected Fabian Simple Cafe Ordering System 1.0 should monitor the Code Projects website and the GitHub repository for updates. Given the public availability of exploit information, implementing the workarounds below is strongly recommended until an official patch becomes available.

Workarounds

• Modify /addmem.php to use parameterized queries (prepared statements) instead of string concatenation for SQL queries
• Implement strict input validation to ensure the studentnum parameter only accepts numeric values
• Deploy network-level access controls to restrict access to the application from trusted sources only
• Consider replacing the vulnerable application with a more secure alternative if patching is not feasible

# Example: Restrict access to addmem.php using Apache .htaccess
# Add the following to your .htaccess file in the application directory
<Files "addmem.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
</Files>