CVE-2026-3411: University Management System SQLi Vulnerability

CVE-2026-3411 Overview

A SQL Injection vulnerability has been identified in itsourcecode University Management System 1.0. This security flaw affects the /admin_single_student_update.php file, where improper handling of the ID parameter allows attackers to inject malicious SQL queries. The vulnerability can be exploited remotely without authentication, potentially allowing unauthorized access to sensitive database information, data manipulation, or complete database compromise.

Critical Impact

Unauthenticated attackers can remotely exploit this SQL injection vulnerability to access, modify, or delete sensitive student and administrative data in the University Management System database.

Affected Products

• itsourcecode University Management System 1.0
• angeljudesuarez university_management_system 1.0

Discovery Timeline

• 2026-03-02 - CVE-2026-3411 published to NVD
• 2026-03-03 - Last updated in NVD database

Technical Details for CVE-2026-3411

Vulnerability Analysis

This SQL injection vulnerability exists within the administrative functionality of the University Management System. The vulnerable endpoint /admin_single_student_update.php accepts an ID parameter that is used to identify specific student records for update operations. The application fails to properly sanitize or parameterize this input before incorporating it into SQL queries, creating a classic SQL injection attack surface.

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). Remote attackers can craft malicious requests containing SQL metacharacters that alter the intended query logic, potentially bypassing authentication, extracting sensitive data, or performing unauthorized modifications to the database.

Root Cause

The root cause of this vulnerability is insufficient input validation and the lack of parameterized queries in the /admin_single_student_update.php file. The ID parameter is directly concatenated into SQL statements without proper sanitization, escaping, or the use of prepared statements. This allows user-controlled input to modify the structure and behavior of database queries.

Attack Vector

The attack vector for CVE-2026-3411 is network-based, meaning attackers can exploit this vulnerability remotely over the network. No authentication is required to initiate the attack, and no user interaction is necessary. An attacker would craft HTTP requests to the vulnerable endpoint with malicious SQL payloads injected into the ID parameter.

The exploitation typically involves techniques such as:

• Union-based SQL injection to extract data from other database tables
• Boolean-based blind SQL injection to infer database contents
• Time-based blind SQL injection using database-specific delay functions
• Error-based SQL injection to extract information through error messages

For technical details regarding proof-of-concept exploitation, see the GitHub CVE Issue Discussion where the exploit has been publicly disclosed.

Detection Methods for CVE-2026-3411

Indicators of Compromise

• Unusual or malformed requests to /admin_single_student_update.php containing SQL metacharacters such as single quotes, double quotes, semicolons, or SQL keywords
• Web server logs showing requests with encoded SQL injection payloads in the ID parameter (e.g., URL-encoded characters like %27, %22, %3B)
• Database query logs revealing unexpected or malformed SQL statements originating from the student update functionality
• Anomalous database access patterns including bulk data extraction or unusual SELECT queries

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the /admin_single_student_update.php endpoint
• Implement database activity monitoring to alert on suspicious query patterns such as UNION SELECT statements, time-based delays, or error-inducing queries
• Configure intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging on web servers to capture full request parameters for forensic analysis
• Monitor database query performance for anomalies that may indicate time-based SQL injection attempts
• Set up alerts for failed database queries or syntax errors that could indicate exploitation attempts
• Review access logs regularly for repeated requests to the vulnerable endpoint with varying ID parameter values

How to Mitigate CVE-2026-3411

Immediate Actions Required

• Take the University Management System offline or restrict access to trusted IP addresses until patches can be applied
• Implement Web Application Firewall rules to block requests containing SQL injection patterns to the vulnerable endpoint
• Review database access logs for evidence of prior exploitation and assess potential data exposure
• If compromise is suspected, reset database credentials and audit for unauthorized data modifications

Patch Information

As of the last NVD update on 2026-03-03, no official vendor patch has been released for this vulnerability. Organizations using itsourcecode University Management System 1.0 should monitor the IT Source Code Blog and VulDB entry for updates regarding security fixes. Consider reaching out to the maintainer directly for remediation guidance.

Workarounds

• Implement input validation on the ID parameter to accept only numeric values using server-side validation
• Modify the vulnerable PHP code to use prepared statements with parameterized queries instead of direct string concatenation
• Deploy a reverse proxy or WAF configured to sanitize or reject requests containing SQL metacharacters
• Restrict network access to administrative endpoints like /admin_single_student_update.php to authorized IP ranges only
• Consider disabling the affected functionality until a proper fix can be implemented

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