CVE-2026-5540 — SQL Injection in code-projects Simple Laundry System 1.0

Executive Summary

CVE-2026-5540 is a SQL injection vulnerability affecting code-projects Simple Laundry System 1.0. The flaw resides in the parameter handler for the firstName argument in the /modifymember.php component. An unauthenticated remote attacker can craft a malicious request to manipulate the underlying SQL query, potentially exfiltrating customer records, laundry service data, and administrative credentials.

CVSS Score: 7.3 (High)

Vulnerability Overview

Root Cause

The application fails to sanitize or parameterize the firstName input before incorporating it into a SQL query. An attacker can append crafted SQL syntax to the firstName value to alter the logic of the resulting database query, enabling unauthorized data extraction, modification, or deletion depending on the web application's database user permissions.

Affected Software

Note: code-projects distributes free, open-source PHP application templates primarily used by students and small businesses in developing regions. These systems are frequently deployed to internet-accessible servers with default configurations and minimal access controls.

Attack Scenario

A remote attacker with network access to the application can:

1. Navigate to /modifymember.php
2. Supply a crafted value for the firstName parameter containing SQL injection syntax
3. The backend SQL query is constructed without sanitization, incorporating the malicious input
4. The attacker receives database output — potentially including member names, contact details, laundry order history, and credentials

Example Payload (Illustrative)

/modifymember.php?firstName=John'+OR+'1'='1

This type of classic injection payload forces the WHERE clause to evaluate as always true, potentially returning all member records from the database.

Impact Assessment

Remediation

Immediate Actions

Since no official patch exists from code-projects at time of publication, administrators running this software should:

1. Take the application offline if it is publicly internet-accessible
2. Implement a web application firewall (WAF) to block SQL injection patterns as a temporary mitigation
3. Restrict access to the application via firewall rules — limit to internal networks only
4. Audit database logs for signs of prior exploitation — look for unusual or malformed parameter values in request logs

Developer Fix

The vulnerability should be remediated using prepared statements (parameterized queries):

// Vulnerable (DO NOT USE)
$query = "SELECT * FROM members WHERE firstName = '" . $_POST['firstName'] . "'";
 
// Secure — parameterized query
$stmt = $pdo->prepare("SELECT * FROM members WHERE firstName = ?");
$stmt->execute([$_POST['firstName']]);

All user-supplied inputs should also be validated against expected types and lengths before processing. String fields like firstName should enforce maximum length and character set restrictions.

Context: code-projects Applications

code-projects distributes numerous free PHP web application templates used by students learning web development and small businesses seeking low-cost management tools. These applications are frequently deployed to live servers with default configurations — sometimes without authentication controls or HTTPS. They are common targets for automated vulnerability scanning and mass exploitation campaigns.

If your organization is running any code-projects application, a comprehensive audit of all user-input handling is strongly recommended.

Key Takeaways

1. CVSS 7.3 (High) — Remotely exploitable with no authentication required
2. No official patch available — mitigate immediately by restricting network access and deploying WAF rules
3. Customer PII at risk — Laundry management systems collect personal and contact information
4. Parameterize all queries — The fix is straightforward but requires developer action on every affected input

References

• NVD — CVE-2026-5540
• OWASP — SQL Injection Prevention Cheat Sheet
• CWE-89 — Improper Neutralization of Special Elements used in an SQL Command