CVE-2025-11480: Simple E-commerce Bookstore SQLi Flaw

CVE-2025-11480 Overview

A SQL injection vulnerability has been identified in SourceCodester Simple E-Commerce Bookstore version 1.0. The vulnerability exists in the /register.php file, where the register_username parameter is not properly sanitized before being used in SQL queries. This allows remote attackers to manipulate database queries by injecting malicious SQL statements through the registration form.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive data from the database, modify or delete records, or potentially gain unauthorized access to the application without authentication.

Affected Products

• Janobe Simple E-Commerce Bookstore 1.0

Discovery Timeline

• October 8, 2025 - CVE-2025-11480 published to NVD
• October 9, 2025 - Last updated in NVD database

Technical Details for CVE-2025-11480

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) in the Simple E-Commerce Bookstore application stems from improper neutralization of special elements used in SQL commands. The /register.php endpoint accepts user input through the register_username parameter without adequate validation or sanitization. When this unsanitized input is concatenated directly into SQL queries, attackers can inject arbitrary SQL code that the database will execute.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component) and CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). This indicates a fundamental failure to implement proper input validation and parameterized queries in the registration functionality.

Root Cause

The root cause is the direct inclusion of user-supplied input from the register_username parameter into SQL queries without proper sanitization, escaping, or the use of prepared statements. The application fails to treat user input as untrusted data, allowing special SQL characters and commands to be interpreted as part of the query structure rather than as literal data values.

Attack Vector

The attack can be executed remotely over the network without requiring any authentication or user interaction. An attacker can craft malicious input containing SQL syntax and submit it through the registration form's username field. The vulnerable parameter accepts the injected payload, which is then executed against the backend database.

The exploit has been publicly disclosed, making it accessible to potential attackers. The attack requires minimal technical complexity, as SQL injection techniques are well-documented and automated tools exist to facilitate exploitation.

Technical details and proof-of-concept information can be found in the GitHub CVE Issue Discussion and the VulDB Entry #327598.

Detection Methods for CVE-2025-11480

Indicators of Compromise

• Unusual SQL error messages in application logs originating from /register.php
• Registration attempts containing SQL syntax characters such as single quotes, double dashes, semicolons, or UNION keywords
• Database query logs showing malformed or unauthorized queries executed during registration events
• Unexpected database modifications or data exfiltration patterns in audit logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in POST requests to /register.php
• Monitor application logs for SQL syntax errors or database exception messages triggered by the registration endpoint
• Deploy intrusion detection systems (IDS) with signatures for common SQL injection payloads
• Analyze network traffic for suspicious patterns in requests containing the register_username parameter

Monitoring Recommendations

• Enable detailed logging for all database queries executed by the application
• Set up alerts for multiple failed registration attempts from the same IP address
• Monitor for unusual database read patterns that may indicate data extraction attempts
• Implement rate limiting on the registration endpoint to slow down automated exploitation attempts

How to Mitigate CVE-2025-11480

Immediate Actions Required

• Take the Simple E-Commerce Bookstore application offline if it is publicly accessible until remediation is complete
• Implement input validation to whitelist acceptable characters for the register_username parameter
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules as an interim measure
• Review database logs for any signs of prior exploitation and assess potential data compromise

Patch Information

No official vendor patch has been released for this vulnerability. The application is distributed through SourceCodester, which provides source code for educational purposes. Organizations using this software should implement manual code fixes or consider migrating to a more secure e-commerce solution.

For additional vulnerability details, refer to the VulDB CTI ID #327598 and VulDB Submission #667391.

Workarounds

• Replace direct SQL query construction with prepared statements and parameterized queries in /register.php
• Implement server-side input validation using allowlists for the username field (alphanumeric characters only)
• Apply the principle of least privilege to the database user account used by the application
• Consider using an ORM (Object-Relational Mapping) framework that automatically handles query parameterization

# Example: Restricting access to registration endpoint via Apache .htaccess
# Add this to your .htaccess file to limit access while implementing fixes
<Files "register.php">
    Order deny,allow
    Deny from all
    Allow from 127.0.0.1
    # Allow from your-trusted-ip-address
</Files>