CVE-2025-2676: Bank Locker Management System SQLi Flaw

CVE-2025-2676 Overview

A critical SQL injection vulnerability has been identified in PHPGurukul Bank Locker Management System version 1.0. The vulnerability exists in the /add-subadmin.php file, where the sadminusername parameter is improperly sanitized before being used in SQL queries. This flaw allows remote attackers to inject malicious SQL statements, potentially compromising the underlying database and sensitive financial data stored within the bank locker management application.

Critical Impact

Unauthenticated remote attackers can exploit this SQL injection vulnerability to extract, modify, or delete sensitive banking and locker management data, potentially leading to unauthorized access to customer records and administrative credentials.

Affected Products

• PHPGurukul Bank Locker Management System 1.0
• Web applications using the vulnerable /add-subadmin.php endpoint
• Systems running unpatched versions of the Bank Locker Management System

Discovery Timeline

• 2025-03-24 - CVE-2025-2676 published to NVD
• 2025-06-04 - Last updated in NVD database

Technical Details for CVE-2025-2676

Vulnerability Analysis

This SQL injection vulnerability occurs in the sub-administrator creation functionality of the Bank Locker Management System. The /add-subadmin.php endpoint accepts user input through the sadminusername parameter without implementing proper input validation or parameterized queries. When processing requests to add new sub-administrators, the application directly concatenates user-supplied input into SQL queries, creating a classic SQL injection attack surface.

The vulnerability is particularly concerning given the sensitive nature of bank locker management systems, which typically store customer personal information, locker assignments, payment records, and access credentials. Successful exploitation could allow attackers to bypass authentication mechanisms, enumerate database contents, extract sensitive customer data, or escalate privileges within the application.

Root Cause

The root cause of this vulnerability is the failure to implement proper input sanitization and parameterized queries in the /add-subadmin.php file. The sadminusername parameter is directly incorporated into SQL statements without escaping special characters or using prepared statements. This represents a fundamental secure coding failure that violates the principle of never trusting user input, especially in database operations handling administrative functionality.

Attack Vector

The attack can be initiated remotely over the network without requiring authentication. An attacker can craft malicious HTTP requests to the /add-subadmin.php endpoint, injecting SQL payloads through the sadminusername parameter. The exploit has been publicly disclosed, increasing the risk of active exploitation.

The attack flow typically involves:

1. Identifying the vulnerable endpoint at /add-subadmin.php
2. Crafting SQL injection payloads targeting the sadminusername parameter
3. Submitting malicious requests to extract database schema information
4. Escalating the attack to dump sensitive data or modify records
5. Potentially obtaining administrative credentials for full system compromise

For technical details regarding exploitation methods, refer to the GitHub CVE Issue Discussion and VulDB #300693.

Detection Methods for CVE-2025-2676

Indicators of Compromise

• Unusual or malformed HTTP requests to /add-subadmin.php containing SQL syntax characters such as single quotes, double dashes, or UNION keywords
• Database error messages appearing in web server logs indicating SQL syntax errors
• Unexpected database queries or access patterns in database audit logs
• Creation of unauthorized sub-administrator accounts
• Evidence of data exfiltration or bulk database queries in network traffic

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in the sadminusername parameter
• Monitor web server access logs for requests to /add-subadmin.php with suspicious query strings or POST data
• Enable database query logging and alert on queries containing injection indicators such as UNION SELECT, OR 1=1, or comment sequences
• Deploy intrusion detection signatures for known SQL injection attack patterns targeting PHP applications

Monitoring Recommendations

• Enable verbose logging on the web server and database server to capture detailed request and query information
• Implement real-time alerting for database errors or unusual query patterns from the web application
• Monitor for unauthorized modifications to user accounts or administrative records in the database
• Regularly review access logs for the /add-subadmin.php endpoint for anomalous request volumes or source IPs

How to Mitigate CVE-2025-2676

Immediate Actions Required

• Restrict network access to the /add-subadmin.php endpoint to trusted IP addresses only using firewall rules or .htaccess configuration
• Deploy a Web Application Firewall (WAF) with SQL injection protection enabled in front of the vulnerable application
• Consider temporarily disabling the sub-administrator creation functionality until a patch is applied
• Review database access logs for evidence of prior exploitation attempts
• Audit existing sub-administrator accounts for unauthorized entries

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations should monitor the PHP Gurukul Security Resource for security updates. In the absence of an official patch, implementing the workarounds below is strongly recommended.

Workarounds

• Modify the /add-subadmin.php file to use prepared statements with parameterized queries instead of string concatenation for all database operations
• Implement server-side input validation to whitelist acceptable characters for the sadminusername field
• Deploy a WAF rule specifically blocking SQL injection attempts in POST parameters to the /add-subadmin.php endpoint
• Restrict access to administrative functions using additional authentication layers or IP-based access controls

# Example .htaccess configuration to restrict access to vulnerable endpoint
<Files "add-subadmin.php">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>