CVE-2026-3740: University Management System SQLi Vulnerability

CVE-2026-3740 Overview

A SQL injection vulnerability has been identified in itsourcecode University Management System 1.0. The vulnerability exists in an unknown function of the file /admin_search_student.php, where the admin_search_student parameter is improperly handled, allowing attackers to inject malicious SQL queries. This attack can be carried out remotely, and the exploit has been made publicly available, increasing the risk of exploitation.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive student and administrative data, modify database records, or potentially execute arbitrary commands on the underlying database server.

Affected Products

• Angeljudesuarez University Management System 1.0

Discovery Timeline

• 2026-03-08 - CVE-2026-3740 published to NVD
• 2026-03-09 - Last updated in NVD database

Technical Details for CVE-2026-3740

Vulnerability Analysis

This vulnerability is classified as SQL Injection (CWE-89) with a broader Injection category (CWE-74). The flaw resides in the administrative student search functionality within /admin_search_student.php. When user-supplied input is passed to the admin_search_student parameter, the application fails to properly sanitize or parameterize the input before incorporating it into SQL queries. This allows attackers to manipulate the query structure and execute arbitrary SQL commands against the backend database.

University management systems typically store sensitive information including student records, grades, financial data, and administrative credentials. Successful exploitation could lead to unauthorized data access, data manipulation, or complete database compromise.

Root Cause

The root cause of this vulnerability is improper input validation and the failure to use parameterized queries or prepared statements when processing user input in the admin_search_student parameter. The application directly concatenates user-supplied data into SQL queries without proper sanitization, creating an injection point that attackers can exploit.

Attack Vector

The attack can be performed remotely over the network without requiring authentication. An attacker can craft malicious input containing SQL syntax and submit it through the admin_search_student parameter in the /admin_search_student.php endpoint. The injected SQL code is then executed by the database server in the context of the application's database connection, potentially granting the attacker access to sensitive data or the ability to modify database contents.

The vulnerability is exploited by manipulating the admin_search_student parameter to inject SQL commands. Attackers typically use techniques such as UNION-based injection to extract data from other tables, Boolean-based blind injection to infer database contents, or time-based blind injection when direct output is not visible. For technical details and proof-of-concept information, refer to the GitHub Issue Tracker and VulDB #349718.

Detection Methods for CVE-2026-3740

Indicators of Compromise

• Unusual or malformed requests to /admin_search_student.php containing SQL syntax characters such as single quotes, double dashes, UNION statements, or OR/AND conditions
• Database error messages appearing in web server logs indicating SQL syntax errors
• Abnormal database query patterns or execution times suggesting injection attempts
• Unexpected data access or exfiltration from student or administrative database tables

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in the admin_search_student parameter
• Enable database query logging and monitor for suspicious query structures or unauthorized data access
• Deploy intrusion detection systems (IDS) with signatures for SQL injection attack patterns
• Review application access logs for repeated requests to /admin_search_student.php with varying malformed inputs

Monitoring Recommendations

• Configure real-time alerting for database query anomalies and failed authentication attempts
• Monitor web server logs for HTTP requests containing SQL injection indicators targeting the vulnerable endpoint
• Implement application-level logging to track parameter values submitted to sensitive administrative functions
• Set up automated scanning to identify exploitation attempts against this specific vulnerability

How to Mitigate CVE-2026-3740

Immediate Actions Required

• Restrict access to the /admin_search_student.php endpoint using network-level controls or authentication requirements until a patch is available
• Implement input validation to reject requests containing SQL injection characters in the admin_search_student parameter
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules enabled
• Consider temporarily disabling the vulnerable student search functionality if operationally feasible

Patch Information

No official vendor patch has been identified at this time. Organizations using itsourcecode University Management System 1.0 should monitor the IT Source Code Resource website and the GitHub Issue Tracker for security updates. Given the open-source nature of the software, organizations may need to implement manual code fixes or apply third-party patches.

Workarounds

• Modify the vulnerable PHP code to use prepared statements with parameterized queries instead of direct string concatenation
• Implement server-side input validation and sanitization for all user-supplied parameters
• Add a WAF rule to block requests containing SQL injection patterns to the vulnerable endpoint
• Restrict access to administrative functions to trusted IP addresses or VPN connections only

The vulnerable code should be updated to use prepared statements. For PHP applications using MySQLi or PDO, ensure all database queries utilize parameterized queries where user input is bound as parameters rather than concatenated into the query string. This prevents user input from being interpreted as SQL syntax.