CVE-2025-4028: PHPGurukul Covid19 System SQLi Vulnerability

CVE-2025-4028 Overview

A critical SQL injection vulnerability has been identified in PHPGurukul COVID19 Testing Management System version 1.0. The vulnerability exists in the /profile.php file where the mobilenumber parameter is improperly handled, allowing remote attackers to inject malicious SQL queries. This flaw enables unauthorized database access, data manipulation, and potential system compromise without requiring authentication.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive medical testing data, manipulate database records, or potentially gain unauthorized access to backend systems. The public disclosure of this exploit increases the risk of active exploitation.

Affected Products

• PHPGurukul COVID19 Testing Management System 1.0
• Systems running vulnerable /profile.php endpoint
• Other parameters within the application may also be affected

Discovery Timeline

• 2025-04-28 - CVE-2025-4028 published to NVD
• 2025-05-10 - Last updated in NVD database

Technical Details for CVE-2025-4028

Vulnerability Analysis

This SQL injection vulnerability stems from insufficient input validation in the /profile.php file of PHPGurukul COVID19 Testing Management System. When processing the mobilenumber parameter, the application fails to properly sanitize user-supplied input before incorporating it into SQL queries. This allows attackers to inject arbitrary SQL commands that are executed against the underlying database.

The vulnerability is network-exploitable, meaning attackers can launch attacks remotely without requiring any prior authentication or user interaction. Given the healthcare context of this application, successful exploitation could expose protected health information (PHI), testing records, patient personal data, and administrative credentials stored in the database.

According to the CVE description, other parameters within the application may also be susceptible to similar SQL injection attacks, suggesting systemic input validation issues throughout the codebase.

Root Cause

The root cause of this vulnerability is the lack of proper input sanitization and parameterized queries in the application's database interaction layer. The mobilenumber parameter is directly concatenated or interpolated into SQL statements without escaping or using prepared statements, creating a classic SQL injection condition. This represents a violation of secure coding practices outlined in CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output).

Attack Vector

The attack vector is network-based, allowing remote exploitation. An attacker can craft malicious HTTP requests to the /profile.php endpoint, injecting SQL payloads through the mobilenumber parameter. The exploitation does not require authentication, special privileges, or user interaction, making it highly accessible to potential attackers.

The attack could be performed by simply modifying the mobilenumber parameter value in a POST or GET request to include SQL metacharacters and query fragments. Common exploitation techniques include UNION-based injection to extract data, boolean-based blind injection, and time-based blind injection for database enumeration.

For detailed technical analysis and proof-of-concept information, refer to the GitHub CVE Issue Tracker and VulDB #306391.

Detection Methods for CVE-2025-4028

Indicators of Compromise

• Unusual SQL syntax or metacharacters (single quotes, UNION, SELECT, etc.) appearing in web server access logs for /profile.php
• Database query errors or exceptions logged when processing requests to the profile endpoint
• Unexpected database queries or access patterns originating from the web application
• Evidence of data exfiltration or unauthorized database reads in application logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the mobilenumber parameter
• Monitor application logs for SQL error messages that may indicate injection attempts
• Deploy database activity monitoring to detect anomalous query patterns or unauthorized data access
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack payloads

Monitoring Recommendations

• Enable detailed logging for all requests to /profile.php and analyze for malicious patterns
• Set up alerts for database errors associated with the affected application
• Monitor for unusual data transfer volumes from the database server
• Implement real-time log correlation to identify coordinated attack attempts

How to Mitigate CVE-2025-4028

Immediate Actions Required

• Restrict or disable access to /profile.php until a patch is applied
• Implement input validation and sanitization for the mobilenumber parameter at the application layer
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules
• Review and audit all user input handling throughout the application for similar vulnerabilities
• Consider taking the application offline if it contains sensitive healthcare data and cannot be immediately secured

Patch Information

As of the last NVD update on 2025-05-10, no official patch has been released by PHPGurukul for this vulnerability. Organizations using this software should monitor the PHP Gurukul Home Page for security updates and patch releases. In the absence of an official patch, implementing the workarounds below is strongly recommended.

Workarounds

• Apply input validation to strictly enforce numeric-only values for the mobilenumber parameter
• Implement prepared statements with parameterized queries for all database interactions
• Use a Web Application Firewall to filter SQL injection payloads before they reach the application
• Limit database user privileges to minimize the impact of successful exploitation
• Consider migrating to a more actively maintained healthcare management solution if patches are not forthcoming

# Example WAF rule for ModSecurity to block SQL injection on mobilenumber parameter
SecRule ARGS:mobilenumber "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in mobilenumber parameter - CVE-2025-4028'"