CVE-2026-3765: University Management System SQLi Vulnerability

CVE-2026-3765 Overview

A SQL Injection vulnerability has been identified in itsourcecode University Management System version 1.0. The vulnerability exists in the /att_single_view.php file, where improper handling of the dt parameter allows attackers to inject malicious SQL commands. This flaw enables remote attackers to manipulate database queries, potentially leading to unauthorized data access, data modification, or data exfiltration from the underlying database.

Critical Impact

Attackers can remotely exploit this SQL Injection vulnerability to access, modify, or delete sensitive university data including student records, attendance information, and administrative credentials without authentication.

Affected Products

• Angeljudesuarez University Management System 1.0
• itsourcecode University Management System 1.0

Discovery Timeline

• 2026-03-08 - CVE CVE-2026-3765 published to NVD
• 2026-03-09 - Last updated in NVD database

Technical Details for CVE-2026-3765

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) stems from insufficient input validation in the attendance viewing functionality of the University Management System. The vulnerable endpoint /att_single_view.php accepts a dt parameter that is directly incorporated into SQL queries without proper sanitization or parameterized query usage.

The vulnerability is classified under both CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), indicating that user-supplied input is being passed to the database engine without adequate filtering or encoding. The exploit has been publicly documented and may be actively used by threat actors targeting educational institutions running this software.

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation and parameterized queries (prepared statements) when processing the dt parameter in /att_single_view.php. The application directly concatenates user input into SQL query strings, allowing attackers to break out of the intended query structure and inject arbitrary SQL commands. This is a classic example of improper neutralization of special elements used in SQL commands.

Attack Vector

The attack can be launched remotely over the network without requiring authentication. An attacker can craft malicious HTTP requests to /att_single_view.php with specially crafted values in the dt parameter. The SQL payload would be processed by the database, allowing the attacker to:

• Extract sensitive data from database tables (student information, credentials)
• Modify or delete existing records
• Potentially escalate to operating system command execution depending on database configuration
• Bypass authentication mechanisms

The vulnerability manifests when the dt parameter is manipulated with SQL injection payloads. See the GitHub Issue Tracker for technical details on the exploitation method.

Detection Methods for CVE-2026-3765

Indicators of Compromise

• Unusual or malformed requests to /att_single_view.php containing SQL syntax such as single quotes, UNION statements, or comment sequences
• Database error messages exposed in application responses indicating SQL syntax errors
• Unexpected database queries containing UNION SELECT, ORDER BY, or information_schema references
• Large data exfiltration from database logs or unusual SELECT queries on sensitive tables

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in the dt parameter
• Monitor web server access logs for requests to /att_single_view.php with suspicious query string patterns
• Enable database query logging and alert on queries containing injection signatures
• Deploy intrusion detection systems (IDS) with SQL injection detection rules

Monitoring Recommendations

• Set up real-time alerting for any requests to /att_single_view.php containing special SQL characters or keywords
• Monitor database audit logs for unauthorized data access or schema enumeration attempts
• Implement application-level logging to track parameter values passed to vulnerable endpoints
• Review authentication logs for any successful logins following potential injection attempts

How to Mitigate CVE-2026-3765

Immediate Actions Required

• Remove or disable public access to /att_single_view.php until a patch is available
• Implement input validation to whitelist acceptable date format patterns for the dt parameter
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules
• Review database user privileges to ensure the application uses least-privilege database accounts

Patch Information

No official vendor patch has been released for this vulnerability at the time of publication. Organizations using this software should contact IT Source Code for updates or consider implementing the workarounds below. Additional technical details are available through VulDB #349743.

Workarounds

• Implement parameterized queries (prepared statements) in the PHP code handling the dt parameter
• Apply strict input validation using allowlists for expected date formats only
• Deploy network-level access controls to restrict access to the vulnerable endpoint
• Consider using a reverse proxy with ModSecurity or similar WAF capabilities to filter malicious requests

# Example Apache ModSecurity rule to block SQL injection attempts
SecRule ARGS:dt "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in dt parameter',\
    tag:'CVE-2026-3765'"