CVE-2025-6885: Teachers Record Management System SQLi Flaw

CVE-2025-6885 Overview

A critical SQL injection vulnerability has been discovered in PHPGurukul Teachers Record Management System version 2.1. The vulnerability exists in the /admin/edit-teacher-detail.php file, where improper handling of the tid parameter allows attackers to inject malicious SQL queries. This flaw enables remote attackers to manipulate database queries without authentication, potentially leading to unauthorized data access, modification, or deletion of sensitive teacher records.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to access, modify, or delete sensitive educational institution data including teacher records, personal information, and administrative credentials without requiring authentication.

Affected Products

• PHPGurukul Teachers Record Management System 2.1
• phpgurukul teachers_record_management_system

Discovery Timeline

• 2025-06-30 - CVE-2025-6885 published to NVD
• 2025-07-08 - Last updated in NVD database

Technical Details for CVE-2025-6885

Vulnerability Analysis

This SQL injection vulnerability stems from inadequate input validation in the teacher record editing functionality. The /admin/edit-teacher-detail.php endpoint accepts the tid parameter (teacher ID) without proper sanitization or parameterized query implementation. When processing requests to edit teacher details, the application directly incorporates user-supplied input into SQL queries, creating a classic injection point.

The vulnerability is remotely exploitable, requiring no user interaction or special privileges. An attacker can craft malicious HTTP requests containing SQL payloads in the tid parameter to manipulate the underlying database queries. This could result in unauthorized disclosure of confidential information (such as teacher personal details, salaries, and credentials), data integrity compromise through record modification, or complete data loss through deletion operations.

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation and parameterized queries (prepared statements) when handling the tid parameter. The application appears to construct SQL queries through string concatenation rather than using secure database interaction methods. This CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component) classification indicates that user-controlled input is not properly neutralized before being incorporated into database queries.

Attack Vector

The attack vector for CVE-2025-6885 is network-based, allowing remote exploitation without authentication. An attacker can submit specially crafted requests to the /admin/edit-teacher-detail.php endpoint with malicious SQL statements embedded in the tid parameter. Common attack techniques include:

The exploitation involves manipulating the tid parameter by appending SQL syntax such as single quotes, UNION statements, or time-based blind injection payloads. Since the vulnerability has been publicly disclosed, attackers may leverage boolean-based, time-based, or UNION-based SQL injection techniques depending on the database response behavior. The public disclosure of this exploit increases the risk of active exploitation in the wild.

Detection Methods for CVE-2025-6885

Indicators of Compromise

• Unusual SQL error messages in web server logs containing references to /admin/edit-teacher-detail.php
• HTTP requests to /admin/edit-teacher-detail.php with abnormal tid parameter values containing SQL syntax (quotes, UNION, SELECT, etc.)
• Unexpected database queries or access patterns involving teacher records
• Evidence of data exfiltration or unauthorized bulk queries against the teachers database table

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in requests to the affected endpoint
• Monitor web server access logs for requests containing common SQL injection payloads targeting the tid parameter
• Deploy database activity monitoring to detect anomalous query patterns or unauthorized data access
• Review PHP error logs for SQL syntax errors that may indicate exploitation attempts

Monitoring Recommendations

• Enable detailed logging for the /admin/edit-teacher-detail.php endpoint and analyze tid parameter values
• Configure intrusion detection systems (IDS) to alert on SQL injection signature matches
• Implement real-time database query monitoring to detect injection-based attacks
• Set up alerts for failed login attempts or unusual administrative access patterns following potential data exfiltration

How to Mitigate CVE-2025-6885

Immediate Actions Required

• Restrict access to the /admin/edit-teacher-detail.php endpoint using IP whitelisting or VPN requirements
• Implement input validation to ensure the tid parameter only accepts numeric values
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules as a temporary mitigation
• Review and audit all user accounts and teacher records for signs of compromise
• Consider taking the application offline if it contains sensitive data and cannot be immediately patched

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations using PHPGurukul Teachers Record Management System 2.1 should monitor the PHP Gurukul Homepage for security updates. Additional technical details about this vulnerability can be found in the GitHub Issue Discussion and VulDB #314364.

Workarounds

• Modify the vulnerable PHP file to use prepared statements (PDO or MySQLi parameterized queries) for all database operations involving the tid parameter
• Implement strict input validation to ensure tid only accepts positive integers using functions like intval() or filter_var() with FILTER_VALIDATE_INT
• Restrict network access to the administrative interface through firewall rules or .htaccess configuration
• Deploy a reverse proxy with SQL injection detection capabilities in front of the application

# Example .htaccess configuration to restrict admin access
<Files "edit-teacher-detail.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>