CVE-2026-3744: Student Web Portal SQL Injection Flaw

CVE-2026-3744 Overview

A SQL injection vulnerability has been identified in code-projects Student Web Portal version 1.0. This vulnerability impacts the valreg_passwdation function within the file signup.php. The manipulation of the reg_passwd argument allows for SQL injection attacks, which can be initiated remotely. The exploit has been publicly disclosed and may be actively used by attackers.

Critical Impact

This SQL injection vulnerability allows remote unauthenticated attackers to manipulate database queries through the signup functionality, potentially leading to unauthorized data access, modification, or deletion.

Affected Products

• Carmelo Student Web Portal 1.0
• code-projects Student Web Portal 1.0

Discovery Timeline

• 2026-03-08 - CVE CVE-2026-3744 published to NVD
• 2026-03-09 - Last updated in NVD database

Technical Details for CVE-2026-3744

Vulnerability Analysis

This SQL injection vulnerability exists in the signup.php file of the Carmelo Student Web Portal application. The vulnerable function valreg_passwdation fails to properly sanitize user-supplied input through the reg_passwd parameter before incorporating it into SQL queries. When user registration data is processed, the password field value is directly concatenated into database queries without adequate input validation or parameterized queries.

The vulnerability is classified under CWE-89 (SQL Injection) and CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component). These weaknesses indicate that the application does not properly neutralize special characters that could modify the intended SQL command structure.

Root Cause

The root cause of this vulnerability is improper input validation and the use of unsanitized user input directly in SQL queries. The valreg_passwdation function in signup.php does not employ prepared statements or parameterized queries, nor does it properly escape special characters in the reg_passwd parameter. This allows attackers to inject arbitrary SQL code that will be executed by the database server with the same privileges as the web application's database user.

Attack Vector

The attack can be initiated remotely over the network without requiring any authentication or user interaction. An attacker can craft malicious input containing SQL metacharacters and inject it through the password field during the registration process. This could allow the attacker to:

1. Extract sensitive information from the database, including other users' credentials and personal data
2. Modify or delete database records
3. Bypass authentication mechanisms
4. Potentially escalate to command execution if database functions permit

The vulnerability exists in the user registration flow, making it accessible to any unauthenticated user who can reach the signup page. Additional technical details and proof-of-concept information can be found in the GitHub CVE Report.

Detection Methods for CVE-2026-3744

Indicators of Compromise

• Unusual or malformed entries in the reg_passwd field containing SQL syntax such as single quotes, semicolons, or SQL keywords
• Database error messages in application logs indicating SQL syntax errors during user registration
• Unexpected database queries or data exfiltration patterns originating from the web application
• Anomalous registration attempts with payloads containing UNION SELECT, OR 1=1, or similar SQL injection patterns

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in HTTP POST parameters targeting signup.php
• Monitor application logs for SQL errors or exceptions during registration processing
• Deploy database activity monitoring to detect unusual query patterns or unauthorized data access
• Use intrusion detection systems with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Enable detailed logging for all database queries executed by the Student Web Portal application
• Configure alerts for multiple failed registration attempts from the same IP address with varying payload patterns
• Implement real-time monitoring of the signup.php endpoint for suspicious parameter values
• Review access logs for signs of automated scanning or exploitation attempts targeting the registration functionality

How to Mitigate CVE-2026-3744

Immediate Actions Required

• Disable or restrict access to the signup.php registration page until a patch can be applied
• Implement a Web Application Firewall (WAF) with SQL injection protection rules
• Review database privileges and ensure the application database user has minimal required permissions
• Audit the database for signs of unauthorized access or data modification

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations using the Carmelo Student Web Portal should monitor the Code Projects website for security updates. In the absence of an official patch, the application code should be manually remediated to use prepared statements or parameterized queries for all database operations involving user input.

For additional vulnerability details and tracking information, refer to VulDB #349722.

Workarounds

• Replace direct SQL query construction with prepared statements using PDO or MySQLi with parameterized queries
• Implement input validation and sanitization on all user-supplied parameters, especially the reg_passwd field
• Deploy network-level access controls to limit exposure of the Student Web Portal to trusted networks only
• Consider deploying a reverse proxy with SQL injection filtering capabilities in front of the application

# Example: Restrict access to signup.php using Apache .htaccess
# Add to .htaccess in the web root directory
<Files "signup.php">
    Order Deny,Allow
    Deny from all
    # Allow only trusted IP ranges
    Allow from 192.168.1.0/24
    Allow from 10.0.0.0/8
</Files>