Overview
SQL Injection is a notorious vulnerability that has plagued web applications for years. The recently discovered CVE-2025-39504 is an instance of this vulnerability, affecting GoodLayers Hotel, a popular hotel management software. This vulnerability arises from improper neutralization of special elements used in an SQL command, enabling potential attackers to execute blind SQL Injection attacks. Given the CVSS Severity Score of 9.3, it’s clear that this particular vulnerability poses a grave risk to the integrity of any system running the affected software and could lead to system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-39504
Severity: Critical (CVSS: 9.3)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System Compromise, Data Leakage
Affected Products
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Product | Affected Versions
GoodLayers Hotel | Through 3.1.4
How the Exploit Works
An attacker exploiting this vulnerability would target the application’s database through specially crafted SQL queries. The application fails to properly sanitize user-supplied input before inserting it into SQL queries. As a result, an attacker can manipulate these queries to extract, alter, or delete data from the database. In the worst-case scenario, this could lead to full system compromise as well.
Conceptual Example Code
The following is a conceptual example of how the vulnerability might be exploited. This example uses a simple HTTP POST request with a malicious SQL command embedded in the request body.
POST /booking HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "booking_date": "2025-12-31'; DROP TABLE bookings; --" }In this example, the attacker attempts to delete the ‘bookings’ table from the database. The malicious SQL command is embedded in the ‘booking_date’ parameter. The application, failing to sanitize the user-supplied input, includes this command in the SQL query, which is then executed against the database.
It’s important to note that this is a simplified example. In a real-world scenario, the exploit might be much more complex, involving multiple steps and obfuscation techniques to evade detection.
Mitigation Guidance
Users of GoodLayers Hotel are strongly advised to apply the vendor-supplied patch to remediate this vulnerability. In the absence of a patch, or as a temporary mitigation, users can employ a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) to detect and block SQL Injection attempts. However, this should not be viewed as a long-term solution, as it does not address the underlying vulnerability in the application.