CVE-2026-37594: Online Employees WFH Attendance SQLi Flaw

CVE-2026-37594 Overview

SourceCodester Online Employees Work From Home Attendance System v1.0 is vulnerable to SQL Injection in the file /wfh_attendance/admin/view_employee.php. This vulnerability allows attackers with high privileges to extract sensitive information from the database through crafted SQL queries injected via network-accessible parameters.

Critical Impact

SQL Injection vulnerability enabling unauthorized database access and potential data exfiltration from the employee attendance management system.

Affected Products

• SourceCodester Online Employees Work From Home Attendance System v1.0
• Component: /wfh_attendance/admin/view_employee.php

Discovery Timeline

• 2026-04-14 - CVE-2026-37594 published to NVD
• 2026-04-14 - Last updated in NVD database

Technical Details for CVE-2026-37594

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) exists in the employee viewing functionality of the SourceCodester Online Employees Work From Home Attendance System. The vulnerable endpoint /wfh_attendance/admin/view_employee.php fails to properly sanitize user-supplied input before incorporating it into SQL queries, creating an injection point that can be exploited over the network.

The vulnerability requires high privileges to exploit, limiting the attack surface to authenticated administrative users. However, once exploited, it enables unauthorized read access to confidential database contents including employee records and attendance data.

Root Cause

The root cause is improper input validation and lack of parameterized queries in the view_employee.php file. User-controlled input is directly concatenated into SQL statements without proper sanitization or the use of prepared statements, violating secure coding practices for database interactions.

Attack Vector

The attack is network-based and targets the administrative interface of the attendance system. An authenticated attacker with administrative privileges can inject malicious SQL syntax through vulnerable parameters in the view_employee.php endpoint. The injected payload is then executed by the database server, allowing the attacker to retrieve confidential information such as employee records, credentials, or other sensitive data stored in the backend database.

The exploitation process typically involves:

1. Authenticating to the admin panel with valid high-privilege credentials
2. Navigating to the vulnerable view_employee.php endpoint
3. Injecting SQL payloads through susceptible parameters
4. Extracting database contents through error-based, time-based, or UNION-based injection techniques

For detailed technical analysis, refer to the GitHub CVE Report.

Detection Methods for CVE-2026-37594

Indicators of Compromise

• Unusual SQL error messages in web server logs related to view_employee.php
• Abnormal query patterns or database errors in application logs
• Unexpected access attempts to the /wfh_attendance/admin/view_employee.php endpoint
• Database query logs showing injection patterns such as UNION SELECT, OR 1=1, or time-based payloads

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns targeting the attendance system
• Monitor HTTP request logs for suspicious characters and SQL keywords in parameters
• Implement database activity monitoring to detect anomalous query behavior
• Review application error logs for SQL syntax errors indicating injection attempts

Monitoring Recommendations

• Enable detailed logging on the /wfh_attendance/admin/ directory endpoints
• Configure alerting for multiple failed database queries from single sessions
• Monitor for data exfiltration patterns from database servers
• Set up real-time alerts for authentication anomalies in the admin panel

How to Mitigate CVE-2026-37594

Immediate Actions Required

• Restrict access to the admin panel to trusted IP addresses only
• Implement additional authentication controls for the view_employee.php endpoint
• Deploy a Web Application Firewall with SQL injection detection rules
• Audit admin user accounts and revoke unnecessary privileges

Patch Information

No official vendor patch has been identified at this time. Organizations using SourceCodester Online Employees Work From Home Attendance System v1.0 should implement the workarounds below and monitor for vendor updates. Additional information may be available in the GitHub CVE Report.

Workarounds

• Modify the view_employee.php file to use parameterized queries or prepared statements
• Apply input validation and sanitization to all user-controllable parameters
• Implement Web Application Firewall rules to block SQL injection payloads
• Consider disabling or restricting the vulnerable endpoint until a proper fix is applied

# Example: Apache mod_security rule to help detect SQL injection attempts
SecRule REQUEST_URI "/view_employee\.php" \
  "id:100001,phase:2,deny,status:403,log,\
  msg:'Potential SQL Injection attempt on view_employee.php',\
  chain"
  SecRule ARGS "@detectSQLi"