CVE-2026-3730: SQL Injection in itsourcecode Free Hotel

CVE-2026-3730: SQL Injection in Free Hotel Reservation System Amenities Panel

A SQL injection vulnerability tracked as CVE-2026-3730 has been disclosed in itsourcecode Free Hotel Reservation System 1.0, a PHP-based open-source hotel reservation management application. The flaw resides in the administrative amenities panel and is remotely exploitable without special privileges, making it a significant risk for any deployment of this software accessible from the internet.

The vulnerability was assigned a CVSS v3.1 score of 7.3 (High) and classified under CWE-89 — Improper Neutralization of Special Elements used in SQL Commands.

Vulnerability Overview

Technical Details

Affected Component

The vulnerability exists in the amenities management module of the hotel admin panel. When an administrator navigates to the edit view at /hotel/admin/mod_amenities/index.php?view=edit, the application accepts amen_id and rmtype_id as query parameters and passes them directly into SQL queries without adequate sanitization or parameterization.

Exploitation Mechanism

An attacker who can reach the admin panel — either through exposed admin interfaces, weak credentials, or a previously compromised session — can inject arbitrary SQL into either the amen_id or rmtype_id parameter:

/hotel/admin/mod_amenities/index.php?view=edit&amen_id=1' OR '1'='1
/hotel/admin/mod_amenities/index.php?view=edit&rmtype_id=1 UNION SELECT NULL,NULL,NULL--

Depending on the database configuration, successful exploitation could allow:

• Extraction of all database contents — including guest records, reservation data, and credentials
• Authentication bypass — if the injected parameter influences access control logic
• Data manipulation — insertion, modification, or deletion of reservation records
• Credential harvesting — exposure of hashed or plaintext administrator passwords stored in the database

Attack Flow

1. Attacker identifies an internet-exposed Free Hotel Reservation System admin panel

2. Attacker probes /hotel/admin/mod_amenities/index.php?view=edit for SQLi

3. Injection payloads are sent via amen_id or rmtype_id query parameters

4. Unsanitized input is executed as SQL against the backend database

5. Attacker extracts sensitive data (guest PII, admin credentials, reservation details)

6. Using harvested admin credentials, attacker achieves full admin panel access

Affected Software Context

itsourcecode is a widely used educational software repository that distributes free PHP web application source code for academic and learning purposes. The Free Hotel Reservation System 1.0 is distributed as a download for students and developers to learn PHP web development.

Despite the educational intent, these applications are frequently deployed in production environments — sometimes by small businesses or academic institutions — without security hardening, creating real-world attack surface. Multiple CVEs affecting itsourcecode projects have been disclosed in recent months, pointing to a systemic pattern of insufficient input validation across their PHP codebase.

Remediation

Immediate Steps

Since no official patch has been released, deployments of this software should consider the following mitigations:

1. Restrict admin panel access — Block /hotel/admin/ from public internet access using firewall rules, .htaccess restrictions, or network-level ACLs
2. Implement a Web Application Firewall (WAF) — Deploy ModSecurity, Cloudflare WAF, or an equivalent with SQL injection detection rules
3. Parameterize all SQL queries — If you maintain a fork, replace raw query construction with prepared statements using PDO or MySQLi
4. Rotate credentials — If the system has been internet-accessible, assume credentials are compromised and rotate all database and application passwords
5. Audit access logs — Review server logs for anomalous requests to the amenities edit endpoint

Code-Level Fix

The root cause is unparameterized query construction. The fix requires replacing direct parameter interpolation:

// Vulnerable pattern
$query = "SELECT * FROM amenities WHERE amen_id = " . $_GET['amen_id'];
 
// Secure pattern (PDO prepared statement)
$stmt = $pdo->prepare("SELECT * FROM amenities WHERE amen_id = ?");
$stmt->execute([$_GET['amen_id']]);

Impact Assessment

Key Takeaways

1. CVE-2026-3730 is a CVSS 7.3 SQL injection in itsourcecode Free Hotel Reservation System 1.0, affecting the amenities admin edit panel
2. The amen_id and rmtype_id GET parameters are unsanitized, enabling direct SQL manipulation
3. A public exploit has been released, raising the urgency for anyone running this software in production
4. No official patch exists — access restriction and WAF deployment are the immediate mitigations
5. This is part of a broader pattern of SQL injection vulnerabilities across itsourcecode PHP applications — any of their applications should be treated as untrusted for production use without a security review

Sources

• CVE-2026-3730 — NIST NVD
• CVE Alert: CVE-2026-3730 — RedPacket Security