CVE-2025-4020: Old Age Home Management System SQLi Flaw

CVE-2025-4020 Overview

A critical SQL injection vulnerability has been identified in PHPGurukul Old Age Home Management System version 1.0. The vulnerability exists in the /contact.php file where the fname parameter is improperly handled, allowing attackers to inject malicious SQL queries. This flaw can be exploited remotely without authentication, potentially compromising the confidentiality, integrity, and availability of the underlying database and application data.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive data, modify database records, or potentially gain unauthorized access to the backend systems managing elderly resident information.

Affected Products

• PHPGurukul Old Age Home Management System 1.0
• Applications using the vulnerable /contact.php endpoint
• Other parameters within the same functionality may also be affected

Discovery Timeline

• 2025-04-28 - CVE-2025-4020 published to NVD
• 2025-04-30 - Last updated in NVD database

Technical Details for CVE-2025-4020

Vulnerability Analysis

This SQL injection vulnerability affects the contact form functionality in PHPGurukul Old Age Home Management System. The fname (first name) parameter in /contact.php fails to properly sanitize user input before incorporating it into SQL queries. This classic injection flaw allows attackers to manipulate database queries by inserting specially crafted SQL statements through the vulnerable parameter.

The vulnerability has been publicly disclosed with exploit details available, increasing the risk of active exploitation. Additionally, the advisory notes that other parameters within the same functionality may be similarly vulnerable, suggesting a systemic lack of input validation in the application's form handling code.

Root Cause

The root cause of CVE-2025-4020 is improper input validation and the absence of parameterized queries or prepared statements in the /contact.php file. User-supplied data from the fname parameter is directly concatenated into SQL queries without sanitization, escaping, or the use of safe database APIs. This violates secure coding practices outlined in CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Attack Vector

The attack can be launched remotely over the network without requiring any authentication or user interaction. An attacker can craft a malicious HTTP request to the /contact.php endpoint with a specially modified fname parameter containing SQL injection payloads. Successful exploitation could allow the attacker to:

• Extract sensitive information from the database including personal details of elderly residents
• Modify or delete database records
• Bypass authentication mechanisms
• Potentially execute administrative operations on the database server

The vulnerability exists in the contact form submission process, making it accessible to any remote attacker who can reach the web application.

Detection Methods for CVE-2025-4020

Indicators of Compromise

• Unusual SQL syntax or keywords appearing in web server logs for requests to /contact.php
• Database error messages being logged or displayed indicating malformed queries
• Unexpected database queries or data access patterns originating from the web application
• Anomalous entries in the fname field containing SQL keywords like UNION, SELECT, OR, AND, or comment sequences

Detection Strategies

• Implement web application firewall (WAF) rules to detect SQL injection patterns in the fname parameter and other form fields
• Deploy database activity monitoring to identify suspicious query patterns or unauthorized data access
• Configure intrusion detection systems (IDS) to alert on common SQL injection signatures targeting the /contact.php endpoint
• Review web server access logs for requests containing encoded or suspicious characters in form parameters

Monitoring Recommendations

• Enable verbose logging for the web application and database to capture detailed request and query information
• Monitor for sudden increases in database read operations or error rates that may indicate exploitation attempts
• Set up alerts for authentication bypass attempts or unauthorized administrative actions
• Regularly audit database access logs for queries that deviate from expected application behavior

How to Mitigate CVE-2025-4020

Immediate Actions Required

• Restrict access to the /contact.php endpoint if the contact form functionality is not critical
• Implement a web application firewall with SQL injection protection rules as an interim measure
• Review and audit all user input handling in the affected application for similar vulnerabilities
• Consider taking the application offline or restricting access until a proper fix can be implemented

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations using PHPGurukul Old Age Home Management System 1.0 should monitor the PHP Gurukul Website for security updates. Additional technical details can be found in the VulDB advisory and the GitHub issue tracking this vulnerability.

Workarounds

• Implement server-side input validation to reject any input containing SQL special characters or keywords
• Deploy parameterized queries or prepared statements to properly separate SQL code from user data
• Use a web application firewall configured to block common SQL injection attack patterns
• Apply the principle of least privilege to database accounts used by the application, limiting potential damage from successful exploitation

# Example WAF rule for ModSecurity to block SQL injection attempts
SecRule ARGS:fname "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    msg:'SQL Injection attempt detected in fname parameter',\
    log,\
    auditlog"