CVE-2026-5257: Simple Laundry System SQLi Vulnerability

CVE-2026-5257 Overview

A SQL injection vulnerability has been identified in code-projects Simple Laundry System 1.0. This security flaw affects the Parameter Handler component, specifically within the /delstaffinfo.php file. The vulnerability allows remote attackers to manipulate the userid argument to execute arbitrary SQL commands against the backend database. The exploit has been publicly disclosed and may be actively used by threat actors.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive data, modify database contents, or potentially compromise the entire database server without authentication.

Affected Products

• code-projects Simple Laundry System 1.0
• Systems running the vulnerable /delstaffinfo.php component
• Deployments with the affected Parameter Handler

Discovery Timeline

• 2026-04-01 - CVE-2026-5257 published to NVD
• 2026-04-01 - Last updated in NVD database

Technical Details for CVE-2026-5257

Vulnerability Analysis

This vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection flaws. The SQL injection vulnerability in Simple Laundry System stems from improper handling of user-supplied input in the userid parameter within the /delstaffinfo.php endpoint.

The vulnerability allows attackers to inject malicious SQL statements through the userid parameter. When the application processes this input without proper sanitization or parameterized queries, the injected SQL code is executed directly against the database. This can lead to unauthorized data access, data manipulation, or complete database compromise.

Root Cause

The root cause of this vulnerability is insufficient input validation and the lack of parameterized queries in the /delstaffinfo.php file. The application directly incorporates user-supplied data from the userid parameter into SQL queries without proper sanitization or escaping, allowing attackers to break out of the intended query structure and inject arbitrary SQL commands.

Attack Vector

The attack can be executed remotely over the network without requiring authentication. An attacker can craft malicious HTTP requests to the /delstaffinfo.php endpoint with specially crafted values in the userid parameter. The injected SQL payload is then processed by the database server, allowing the attacker to:

• Extract sensitive information from the database
• Modify or delete existing records
• Bypass authentication mechanisms
• Potentially execute system commands depending on database configuration

The vulnerability is straightforward to exploit, requiring only basic knowledge of SQL injection techniques and no special privileges or user interaction.

Detection Methods for CVE-2026-5257

Indicators of Compromise

• Unusual HTTP requests to /delstaffinfo.php containing SQL syntax in the userid parameter
• Database query logs showing unexpected SQL statements or error messages
• Abnormal database access patterns or unauthorized data extraction attempts
• Web application firewall (WAF) alerts for SQL injection patterns targeting the affected endpoint

Detection Strategies

• Deploy web application firewall rules to detect and block SQL injection attempts targeting /delstaffinfo.php
• Monitor application logs for anomalous requests containing SQL keywords such as UNION, SELECT, DROP, or comment characters in the userid parameter
• Implement database activity monitoring to identify suspicious query patterns or unauthorized access attempts
• Configure intrusion detection systems (IDS) with signatures for SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging for the /delstaffinfo.php endpoint and review logs regularly for suspicious activity
• Set up alerts for database errors that may indicate exploitation attempts
• Monitor for unusual outbound traffic from the database server that could indicate data exfiltration
• Conduct periodic security assessments to identify potential SQL injection vulnerabilities

How to Mitigate CVE-2026-5257

Immediate Actions Required

• Restrict access to the /delstaffinfo.php endpoint using network-level controls or authentication requirements
• Deploy web application firewall rules to filter malicious SQL injection payloads
• Implement input validation to ensure the userid parameter only accepts expected numeric values
• Review and audit all database queries in the application for similar injection vulnerabilities

Patch Information

At the time of publication, no official patch from the vendor has been documented. Organizations using Simple Laundry System 1.0 should monitor the Code Projects Resource for security updates. Additional technical details and vulnerability information can be found in the GitHub Issue Report and VulDB Vulnerability #354447.

Workarounds

• Implement prepared statements and parameterized queries in the /delstaffinfo.php file to prevent SQL injection
• Add server-side input validation to sanitize the userid parameter before use in database queries
• Deploy a web application firewall configured to block SQL injection attack patterns
• Consider disabling or restricting access to the vulnerable endpoint until a proper fix is implemented

# Example: Apache .htaccess restriction for the vulnerable endpoint
<Files "delstaffinfo.php">
    Order Deny,Allow
    Deny from all
    # Allow only from trusted IP addresses
    Allow from 192.168.1.0/24
</Files>