CVE-2025-6323: Phpgurukul Pre-school SQLI Vulnerability

CVE-2025-6323 Overview

A critical SQL Injection vulnerability has been identified in PHPGurukul Pre-School Enrollment System version 1.0. The vulnerability exists in the /enrollment.php file where the fathername parameter is improperly sanitized before being used in SQL queries. This flaw allows remote attackers to manipulate database queries, potentially leading to unauthorized data access, data manipulation, or complete database compromise. The exploit has been publicly disclosed, and other parameters in the affected file may also be vulnerable.

Critical Impact

Remote attackers can exploit this SQL Injection vulnerability to bypass authentication, extract sensitive data from the database, modify or delete records, and potentially gain unauthorized access to the underlying system hosting the Pre-School Enrollment application.

Affected Products

• PHPGurukul Pre-School Enrollment System 1.0
• Web applications using the vulnerable /enrollment.php endpoint
• Systems running unpatched versions of the enrollment software

Discovery Timeline

• 2025-06-20 - CVE-2025-6323 published to NVD
• 2025-06-26 - Last updated in NVD database

Technical Details for CVE-2025-6323

Vulnerability Analysis

This SQL Injection vulnerability occurs due to insufficient input validation in the enrollment form processing logic. When users submit enrollment data through the /enrollment.php endpoint, the fathername parameter is directly concatenated into SQL queries without proper sanitization or parameterized query implementation. This classic injection flaw allows attackers to inject arbitrary SQL commands that will be executed with the privileges of the database user configured for the web application.

The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The attack can be executed remotely over the network without requiring authentication or user interaction.

Root Cause

The root cause is the lack of input sanitization and the use of dynamic SQL query construction. The application directly incorporates user-supplied input from the fathername form field into database queries without using prepared statements, parameterized queries, or proper escaping mechanisms. This allows SQL metacharacters to be interpreted as part of the query structure rather than as literal data values.

Attack Vector

The attack can be initiated remotely via network access to the vulnerable enrollment form. An attacker can craft malicious input containing SQL syntax within the fathername parameter field. When this payload is submitted to /enrollment.php, the injected SQL commands execute against the backend database. Depending on the database configuration and application privileges, attackers may be able to:

• Extract sensitive enrollment records and personal information
• Bypass authentication mechanisms
• Modify or delete database records
• Escalate privileges within the database
• Potentially achieve remote code execution through database-specific features

The vulnerability mechanism involves improper neutralization of user input in the fathername parameter of the enrollment form. When malicious SQL syntax is submitted through this field, the application fails to sanitize the input before incorporating it into database queries, allowing the injected commands to execute. For detailed technical analysis, see the GitHub Issue Discussion and VulDB Entry #313323.

Detection Methods for CVE-2025-6323

Indicators of Compromise

• Unusual or malformed entries in the fathername database field containing SQL syntax characters such as single quotes, semicolons, or SQL keywords
• Web server logs showing requests to /enrollment.php with suspicious parameter values containing SQL injection patterns
• Database error messages or anomalies in application logs indicating SQL syntax errors
• Unexpected database queries or access patterns in database audit logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in form submissions
• Monitor application logs for requests containing SQL metacharacters in the fathername and related enrollment parameters
• Deploy database activity monitoring to detect unusual query patterns or unauthorized data access attempts
• Conduct regular vulnerability scans targeting SQL injection in web application forms

Monitoring Recommendations

• Enable verbose logging on the web server for all POST requests to /enrollment.php
• Configure database audit logging to track all queries executed against enrollment-related tables
• Set up alerts for database error conditions that may indicate injection attempts
• Monitor for bulk data extraction patterns that could indicate successful exploitation

How to Mitigate CVE-2025-6323

Immediate Actions Required

• Restrict access to the /enrollment.php endpoint using network-level controls or authentication requirements
• Implement input validation to reject submissions containing SQL metacharacters in the fathername and other parameters
• Deploy a Web Application Firewall with SQL injection protection rules enabled
• Review web server and database logs for evidence of prior exploitation attempts

Patch Information

No official patch has been released by PHPGurukul at the time of publication. Organizations should monitor the PHP Gurukul website for security updates. In the absence of an official patch, implementing the workarounds and code-level fixes described below is strongly recommended.

Workarounds

• Replace dynamic SQL query construction with prepared statements and parameterized queries throughout the application
• Implement server-side input validation to sanitize all user-supplied data before database operations
• Apply the principle of least privilege to database user accounts used by the application
• Consider taking the enrollment form offline until proper security controls can be implemented

# Example: Restrict access to enrollment.php via .htaccess
# Add to .htaccess in the web application directory

# Deny access to enrollment.php except from trusted IPs
<Files "enrollment.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
</Files>

# Alternative: Require authentication for the enrollment page
<Files "enrollment.php">
    AuthType Basic
    AuthName "Restricted Access"
    AuthUserFile /path/to/.htpasswd
    Require valid-user
</Files>