CVE-2026-5565: Simple Laundry System 1.0 SQLi Vulnerability

CVE-2026-5565 Overview

A SQL injection vulnerability has been identified in code-projects Simple Laundry System 1.0. The vulnerability exists in the /delmemberinfo.php file within the Parameter Handler component. Manipulation of the userid argument enables SQL injection attacks, allowing remote attackers to execute arbitrary SQL commands against the backend database. The exploit has been disclosed publicly and may be actively used.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data, modify database contents, or potentially achieve further system compromise through database server exploitation.

Affected Products

• code-projects Simple Laundry System 1.0
• /delmemberinfo.php Parameter Handler component

Discovery Timeline

• 2026-04-05 - CVE-2026-5565 published to NVD
• 2026-04-07 - Last updated in NVD database

Technical Details for CVE-2026-5565

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) affects the Simple Laundry System web application. The vulnerability resides in the /delmemberinfo.php endpoint, which handles user deletion functionality through the Parameter Handler component.

The application fails to properly sanitize or validate the userid parameter before incorporating it into SQL queries. This allows attackers to inject malicious SQL statements that are executed by the database server with the privileges of the application's database user.

Root Cause

The root cause of this vulnerability is insufficient input validation and lack of parameterized queries in the /delmemberinfo.php file. The application directly concatenates user-supplied input from the userid parameter into SQL statements without proper sanitization, escaping, or the use of prepared statements. This classic injection pattern allows attacker-controlled data to be interpreted as SQL code rather than data.

Attack Vector

The vulnerability is exploitable remotely over the network without requiring authentication. An attacker can craft malicious HTTP requests to the /delmemberinfo.php endpoint, injecting SQL payloads through the userid parameter. The attack requires no user interaction and can be launched directly against exposed instances of the Simple Laundry System application.

Successful exploitation could allow attackers to:

• Extract sensitive customer and business data from the database
• Modify or delete database records
• Bypass authentication mechanisms
• Potentially escalate to remote code execution depending on database server configuration

For technical details regarding the exploit mechanism, refer to the GitHub CVE Issue Tracker and the VulDB Vulnerability Report #355335.

Detection Methods for CVE-2026-5565

Indicators of Compromise

• Unusual SQL error messages in application logs originating from /delmemberinfo.php
• HTTP requests to /delmemberinfo.php containing SQL syntax characters such as single quotes, semicolons, or SQL keywords in the userid parameter
• Database query logs showing unexpected UNION, SELECT, or other SQL manipulation attempts
• Anomalous database access patterns or data exfiltration activity

Detection Strategies

• Implement web application firewall (WAF) rules to detect SQL injection patterns in the userid parameter
• Monitor HTTP access logs for requests to /delmemberinfo.php with suspicious query strings containing SQL meta-characters
• Deploy database activity monitoring to identify unusual query patterns or unauthorized data access
• Use intrusion detection systems (IDS) with SQL injection signature rules

Monitoring Recommendations

• Enable verbose logging on the web server for requests targeting /delmemberinfo.php
• Configure database audit logging to track queries executed against sensitive tables
• Set up alerting for HTTP 500 errors or database errors that may indicate injection attempts
• Review web server and application logs regularly for reconnaissance and exploitation activity

How to Mitigate CVE-2026-5565

Immediate Actions Required

• Remove or disable access to /delmemberinfo.php until a patch is available
• Implement input validation on the userid parameter to accept only expected formats (e.g., numeric values)
• Deploy a web application firewall (WAF) with SQL injection protection rules
• Restrict network access to the Simple Laundry System application to trusted IP addresses only

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Monitor the Code Projects Security Resources for updates and patch availability. Organizations should consider applying virtual patching through WAF rules until an official fix is released.

For additional technical information and updates, refer to:

• VulDB Submission #782977
• VulDB CTI for #355335

Workarounds

• Implement prepared statements or parameterized queries in the /delmemberinfo.php file to prevent SQL injection
• Apply strict input validation allowing only numeric characters for the userid parameter
• Use stored procedures with proper input handling as an additional defense layer
• Consider disabling the member deletion functionality entirely until proper security controls are implemented

# Example WAF rule to block SQL injection attempts (ModSecurity)
SecRule ARGS:userid "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in userid parameter',\
    tag:'CVE-2026-5565'"