CVE-2026-37346: Payroll Management System SQLi Flaw

CVE-2026-37346 Overview

SourceCodester Payroll Management and Information System v1.0 contains a SQL Injection vulnerability in the file /payroll/view_account.php via the emp_id parameter. This vulnerability allows attackers with high-level privileges to inject malicious SQL queries through a network-accessible endpoint, potentially compromising the confidentiality, integrity, and availability of the payroll database.

Critical Impact

SQL Injection in payroll systems can expose sensitive employee financial data, salary information, and personal details while potentially allowing unauthorized modifications to payroll records.

Affected Products

• SourceCodester Payroll Management and Information System v1.0
• Applications using the vulnerable /payroll/view_account.php endpoint

Discovery Timeline

• 2026-04-16 - CVE-2026-37346 published to NVD
• 2026-04-16 - Last updated in NVD database

Technical Details for CVE-2026-37346

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) exists in the /payroll/view_account.php file of SourceCodester Payroll Management and Information System v1.0. The application fails to properly sanitize user input passed through the emp_id parameter before incorporating it into SQL queries. When a user submits a crafted request containing malicious SQL syntax in the emp_id parameter, the application passes this input directly to the database engine without adequate validation or parameterization.

The vulnerability requires high privileges to exploit but can be leveraged over the network without user interaction. Successful exploitation could allow an attacker to read, modify, or delete sensitive payroll data, potentially bypassing application-level access controls to access records beyond their authorization scope.

Root Cause

The root cause of this vulnerability is improper input validation and the use of unsanitized user input in database queries. The emp_id parameter value is concatenated directly into SQL statements without proper escaping, prepared statements, or parameterized queries. This classic SQL Injection pattern allows attackers to break out of the intended query structure and inject arbitrary SQL commands.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An authenticated attacker with high privileges can craft malicious HTTP requests to the /payroll/view_account.php endpoint with a specially crafted emp_id parameter containing SQL injection payloads. The injection point allows various SQL manipulation techniques including UNION-based injection, boolean-based blind injection, and time-based blind injection to extract or manipulate data.

The vulnerability is accessible via direct HTTP requests to the vulnerable endpoint. An attacker would modify the emp_id parameter to include SQL metacharacters and query fragments that alter the intended SQL logic. For detailed technical information about the exploitation mechanism, see the GitHub CVE Report.

Detection Methods for CVE-2026-37346

Indicators of Compromise

• Unusual SQL syntax or metacharacters (single quotes, double dashes, UNION statements) appearing in web server access logs for /payroll/view_account.php
• Database query logs showing anomalous queries originating from the payroll application
• Unexpected access patterns to the view_account.php endpoint with malformed emp_id parameter values
• Database errors or exceptions logged that reference SQL syntax errors in queries containing user input

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common SQL injection patterns targeting the emp_id parameter
• Implement database activity monitoring to alert on suspicious query patterns such as UNION-based or stacked queries
• Enable verbose logging on the web application and database servers to capture full request parameters for forensic analysis
• Use intrusion detection systems (IDS) with SQL injection signature rules to monitor network traffic to the application

Monitoring Recommendations

• Monitor access logs for the /payroll/view_account.php endpoint for requests containing SQL injection indicators
• Set up alerts for database query failures or syntax errors that may indicate exploitation attempts
• Track and baseline normal access patterns to the payroll system to identify anomalous high-privilege account activity

How to Mitigate CVE-2026-37346

Immediate Actions Required

• Restrict access to the /payroll/view_account.php endpoint to only essential administrative IP addresses or networks
• Implement input validation on the emp_id parameter to accept only numeric values
• Deploy WAF rules to block SQL injection patterns targeting this endpoint
• Review database access logs for evidence of exploitation and audit sensitive payroll data for unauthorized changes

Patch Information

No official vendor patch information is currently available. Organizations using SourceCodester Payroll Management and Information System v1.0 should monitor for vendor updates and apply security patches when released. In the interim, implement the workarounds and compensating controls described below. For additional details, see the GitHub CVE Report.

Workarounds

• Modify the application code to use prepared statements or parameterized queries for all database interactions involving the emp_id parameter
• Implement strict input validation to ensure emp_id accepts only expected integer values, rejecting any input containing non-numeric characters
• Apply network-level access controls to limit which users or systems can reach the vulnerable endpoint
• Consider disabling or removing the vulnerable endpoint if it is not critical to business operations until a proper fix is applied

# Example: Restrict access to the vulnerable endpoint via .htaccess
<Files "view_account.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
</Files>