code-projects Simple Laundry System 1.0 SQL Injection Vulnerability

A security vulnerability, CVE-2026-5565, has been identified in code-projects Simple Laundry System version 1.0. This vulnerability is located within the /delmemberinfo.php file, specifically affecting the handling of the userid parameter. Successful exploitation of this flaw allows for SQL injection, enabling a remote attacker to potentially manipulate database queries. Publicly available exploits exist, increasing the risk of widespread exploitation targeting vulnerable installations of the Simple Laundry System 1.0. This could lead to unauthorized data access, modification, or deletion. The vulnerability was reported on April 5, 2026.

Attack Chain

1. Attacker identifies a vulnerable Simple Laundry System 1.0 instance.
2. Attacker crafts a malicious HTTP request targeting /delmemberinfo.php.
3. The crafted request includes a SQL injection payload within the userid parameter.
4. The application fails to properly sanitize the userid input.
5. The unsanitized input is passed directly into a SQL query.
6. The attacker’s SQL injection payload is executed by the database server.
7. The attacker gains the ability to read, modify, or delete data within the database.
8. The attacker may escalate privileges or pivot to other parts of the system depending on the database configuration and application code.

Impact

Successful exploitation of CVE-2026-5565 allows attackers to inject arbitrary SQL commands into the Simple Laundry System 1.0 database. This can lead to unauthorized data access, modification, or deletion, potentially compromising sensitive user information, laundry transaction data, and system configurations. A successful attack could result in financial losses, reputational damage, and legal liabilities for affected laundry businesses. While the exact number of vulnerable installations is unknown, the availability of public exploits increases the likelihood of widespread attacks.

Recommendation

• Inspect web server logs for suspicious requests to /delmemberinfo.php containing potentially malicious SQL syntax within the userid parameter (reference: Attack Chain).
• Deploy the Sigma rule provided below to detect SQL injection attempts targeting the vulnerable endpoint (reference: Sigma rule “Detect SQL Injection Attempts to delmemberinfo.php”).
• Apply input validation and sanitization to the userid parameter in /delmemberinfo.php to prevent SQL injection (reference: CVE-2026-5565).