CVE-2025-4164: PHPGurukul Employee Record System SQLi

CVE-2025-4164 Overview

A critical SQL Injection vulnerability has been identified in PHPGurukul Employee Record Management System version 1.3. The vulnerability exists in the changepassword.php file, where the currentpassword parameter is not properly sanitized before being used in SQL queries. This allows remote attackers to inject malicious SQL commands, potentially leading to unauthorized data access, modification, or deletion.

Critical Impact

Remote attackers can exploit this SQL Injection vulnerability to bypass authentication, extract sensitive employee data, or manipulate database records without authorization.

Affected Products

• PHPGurukul Employee Record Management System 1.3
• changepassword.php component

Discovery Timeline

• 2025-05-01 - CVE-2025-4164 published to NVD
• 2025-05-16 - Last updated in NVD database

Technical Details for CVE-2025-4164

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) occurs due to improper neutralization of special characters in the currentpassword parameter within the changepassword.php file. The application fails to implement proper input validation and parameterized queries, allowing attackers to inject arbitrary SQL commands through user-supplied input.

The vulnerability is network-accessible, meaning attackers can exploit it remotely without requiring authentication. The exploitation is straightforward with low attack complexity, requiring no special privileges or user interaction. When successfully exploited, attackers can achieve unauthorized access to confidential employee records, manipulate data integrity, or cause service disruptions.

Root Cause

The root cause of this vulnerability is classified under CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The changepassword.php file directly incorporates user input from the currentpassword parameter into SQL queries without proper sanitization, escaping, or the use of prepared statements. This classic injection flaw allows attackers to break out of the intended query structure and execute arbitrary SQL commands.

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can craft malicious input in the currentpassword field that contains SQL syntax designed to manipulate the underlying database query. By injecting characters such as single quotes, comments, or UNION statements, attackers can alter query logic to extract data, bypass authentication checks, or perform unauthorized database operations.

The vulnerability in changepassword.php can be exploited by submitting specially crafted values in the password change form. Since this is a password-related function, successful exploitation could allow attackers to change user passwords without knowing the original credentials, effectively taking over user accounts.

Detection Methods for CVE-2025-4164

Indicators of Compromise

• Unusual SQL error messages in application logs originating from changepassword.php
• Multiple failed password change attempts with suspicious characters in request parameters
• Database query logs showing unexpected UNION, SELECT, or comment syntax
• Evidence of data exfiltration or unauthorized database modifications

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in POST requests to changepassword.php
• Monitor application logs for SQL syntax errors or database exception messages
• Deploy database activity monitoring to detect anomalous queries or unauthorized data access
• Use intrusion detection systems with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging for all requests to changepassword.php and similar authentication-related endpoints
• Configure alerts for multiple failed password change attempts from single IP addresses
• Monitor database audit logs for unexpected query patterns or privilege escalation attempts
• Implement real-time alerting for SQL error conditions in production environments

How to Mitigate CVE-2025-4164

Immediate Actions Required

• Restrict access to changepassword.php until a patch is applied or input validation is implemented
• Deploy WAF rules to block SQL injection patterns in the currentpassword parameter
• Review and audit all user input handling in the Employee Record Management System
• Consider taking the application offline if it handles sensitive employee data and cannot be adequately protected

Patch Information

No official vendor patch has been announced for this vulnerability at the time of publication. Organizations using PHPGurukul Employee Record Management System 1.3 should monitor the PHP Gurukul Homepage for security updates. Additional technical details can be found in the GitHub Issue Tracker and VulDB #306696.

Workarounds

• Implement prepared statements with parameterized queries in changepassword.php to prevent SQL injection
• Add server-side input validation to reject special SQL characters in the currentpassword parameter
• Deploy a Web Application Firewall with SQL injection detection capabilities
• Apply the principle of least privilege to database accounts used by the application
• Consider using a PHP security library or framework that provides automatic input sanitization

To implement basic input sanitization as a temporary measure, modify the PHP code handling the currentpassword parameter to use prepared statements with PDO or MySQLi. Ensure all user inputs are properly escaped or parameterized before inclusion in SQL queries.