Executive Summary

CVE-2026-5195 is a high-severity SQL Injection vulnerability found in the Student Membership System version 1.0, specifically in the user registration feature. The issue occurs because user-supplied data from the $_POST array is directly concatenated into SQL queries without any filtering, escaping, or parameterization.

This insecure coding practice allows an attacker to inject arbitrary SQL commands by crafting malicious input, exploiting the vulnerable code that uses the mysql_query function to insert user data into the database.

As a result, an attacker can manipulate inputs such as firstname, lastname, age, and others to execute arbitrary SQL commands.

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Impact Analysis

This vulnerability can have severe impacts including the ability for an attacker to delete database tables, read sensitive data, modify data, or even gain a database shell.

Effectively, this grants the attacker complete control over the database, which can lead to data breaches, loss of data integrity, and disruption of service.

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Detection Guidance

This vulnerability can be detected by testing the user registration feature for SQL injection flaws, especially by sending crafted input in the POST data to the /index.php endpoint.

One way to detect it is to manually or automatically inject SQL payloads into the registration form fields (e.g., firstname, lastname) and observe if the application behaves unexpectedly or returns database errors.

For command-line detection, tools like sqlmap can be used to test the endpoint for SQL injection vulnerabilities.

• Example sqlmap command: sqlmap -u "http://targetsite/index.php" --data="firstname=test&lastname=test" --risk=3 --level=5 --batch
• Alternatively, use curl to send crafted POST requests and check for SQL error messages or anomalies in responses.

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Mitigation Strategies

Immediate mitigation involves fixing the vulnerable code by replacing the direct concatenation of user inputs into SQL queries with prepared statements using PDO or mysqli.

Additionally, enforce strict type validation and proper escaping of all user inputs to prevent injection.

If code changes are not immediately possible, consider applying web application firewall (WAF) rules to block common SQL injection payloads targeting the registration endpoint.

Also, monitor database logs and application logs for suspicious queries or errors that may indicate exploitation attempts.

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Compliance Impact

The SQL Injection vulnerability in the Student Membership System 1.0 allows attackers to read, modify, or delete sensitive data stored in the database. This unauthorized access and manipulation of personal data can lead to violations of data protection regulations such as GDPR and HIPAA, which require the protection of personal and sensitive information from unauthorized access and breaches.

Failure to secure user input and prevent SQL Injection can result in data breaches, exposing personally identifiable information (PII) or protected health information (PHI), thereby compromising compliance with these standards.

Mitigating this vulnerability by implementing prepared statements and input validation is essential to maintain compliance with such regulations.

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