CVE-2026-3747 Overview
A SQL injection vulnerability has been identified in itsourcecode University Management System version 1.0. The vulnerability exists in the file /add_result.php, where improper handling of the subject parameter allows attackers to inject malicious SQL queries. This flaw can be exploited remotely without authentication, potentially allowing unauthorized access to the underlying database, data manipulation, or information disclosure.
Critical Impact
Remote attackers can exploit this SQL injection vulnerability to access, modify, or delete sensitive university data including student records, grades, and administrative information without authentication.
Affected Products
- Angeljudesuarez University Management System 1.0
- itsourcecode University Management System 1.0
Discovery Timeline
- 2026-03-08 - CVE-2026-3747 published to NVD
- 2026-03-09 - Last updated in NVD database
Technical Details for CVE-2026-3747
Vulnerability Analysis
This SQL injection vulnerability (CWE-89) exists in the /add_result.php file of the University Management System. The application fails to properly sanitize user-supplied input passed through the subject parameter before incorporating it into SQL queries. This allows an attacker to modify the query structure, potentially bypassing authentication mechanisms, extracting sensitive data, or manipulating database records.
The vulnerability is classified under both 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), indicating a fundamental input validation failure. The exploit is publicly documented and can be launched remotely over the network without requiring any user interaction or prior authentication.
Root Cause
The root cause of this vulnerability is inadequate input validation and the absence of parameterized queries or prepared statements when processing the subject parameter in /add_result.php. The application directly concatenates user-supplied input into SQL queries without proper sanitization, escaping, or the use of secure coding practices. This allows specially crafted input containing SQL meta-characters to alter the intended query logic.
Attack Vector
The attack can be launched remotely over the network. An unauthenticated attacker can send a crafted HTTP request to the vulnerable /add_result.php endpoint with malicious SQL code embedded in the subject parameter. The network-based attack vector requires no special access conditions, user interaction, or authentication, making it relatively straightforward to exploit.
The vulnerability allows attackers to inject SQL commands that may result in unauthorized data access, data modification, or extraction of sensitive information from the university database. Given the nature of university management systems, compromised data could include student personal information, academic records, grades, and administrative credentials.
Detection Methods for CVE-2026-3747
Indicators of Compromise
- Unusual or malformed HTTP requests to /add_result.php containing SQL keywords such as UNION, SELECT, DROP, or comment sequences (--, /*)
- Database error messages appearing in application logs or responses indicating SQL syntax errors
- Unexpected database queries or access patterns in database audit logs
- Evidence of data exfiltration or unauthorized modifications to student records or grades
Detection Strategies
- Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to /add_result.php
- Implement application-layer logging to capture all requests to the vulnerable endpoint for forensic analysis
- Monitor database query logs for anomalous patterns such as unauthorized UNION SELECT statements or attempts to access system tables
- Use intrusion detection systems (IDS) with signatures tuned for SQL injection attacks
Monitoring Recommendations
- Enable verbose logging on the web server to capture full request details including POST parameters
- Configure database auditing to track queries originating from the web application user account
- Set up alerts for failed authentication attempts or access to sensitive database tables
- Regularly review access logs for patterns consistent with automated SQL injection scanning tools
How to Mitigate CVE-2026-3747
Immediate Actions Required
- If possible, temporarily disable or restrict access to /add_result.php until a proper fix can be applied
- Implement Web Application Firewall rules to filter SQL injection attempts targeting the subject parameter
- Restrict database user privileges to the minimum necessary for application functionality
- Review and audit recent database activity for signs of exploitation
Patch Information
No official patch information has been provided by the vendor at this time. Organizations using University Management System 1.0 should monitor the IT Source Code website for updates and security advisories.
For additional vulnerability details and tracking, refer to the following resources:
Workarounds
- Apply input validation on the subject parameter to reject any input containing SQL meta-characters or keywords
- Implement prepared statements or parameterized queries for all database interactions in /add_result.php
- Deploy a reverse proxy or WAF configured with SQL injection protection rules in front of the application
- Consider network segmentation to limit access to the vulnerable application from untrusted networks
Since no official patch is available, the most effective mitigation is to modify the source code to use prepared statements. Example implementation approach:
# Recommended fix: Use prepared statements instead of direct query concatenation
# Replace direct query construction with parameterized queries
# Example using PDO:
# $stmt = $pdo->prepare("INSERT INTO results (subject) VALUES (:subject)");
# $stmt->execute(['subject' => $subject]);
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
