Apartment Visitors Management System SQL injection leaks database (CVE-2026-39110)

Vendor-confirmed - CVE-2026-39110 is a high SQL injection in Apartment Visitors Management System 1.1 that lets an unauthenticated attacker execute arbitrary SQL commands to steal or modify database contents. Patch as soon as the vendor releases it.

Overview

A high-severity SQL injection vulnerability has been identified in Apartment Visitors Management System version 1.1. The flaw is located in the contactno parameter of the forgot-password.php page. This allows an unauthenticated attacker to execute arbitrary SQL commands on the underlying database.

Vulnerability Details

The system fails to properly validate or sanitize user input in the contact number field on the password recovery page. Because an attacker can interact with this page without any login credentials, they can craft malicious SQL payloads. These payloads are sent directly to the database, enabling data theft or manipulation. The CVSS v3.1 base score is 8.2, reflecting the high risk due to the network accessibility, low attack complexity, and lack of required privileges.

Impact

Successful exploitation of this vulnerability allows an attacker to read, modify, or delete sensitive information stored in the application’s database. This could include resident personal data, visitor logs, administrator credentials, and other private records. The breach of such information could lead to identity theft, privacy violations, and further system compromise. For more on the consequences of data leaks, see our breach reports.

Remediation and Mitigation

The primary remediation is to apply a patch from the software vendor as soon as it becomes available. Until a patch is released, consider the following immediate actions:

• Isolate the System: Restrict network access to the application to only trusted internal networks. Do not expose it directly to the internet.
• Web Application Firewall (WAF): Deploy or configure a WAF to block SQL injection patterns targeting the forgot-password.php endpoint.
• Temporary Disablement: If the password recovery function is not critically needed, consider temporarily disabling the forgot-password.php page.
• Code Review: Developers should review and implement parameterized queries or prepared statements for all database interactions to prevent similar flaws.

Monitor vendor channels for an official security advisory and patch. For the latest on emerging threats, follow our security news.

Security Insight

This vulnerability is a classic example of how authentication bypass pages, like password recovery, are often overlooked in security testing, creating a low-hanging entry point for attackers. It mirrors a common pattern seen in many niche or small-vendor software products where basic security hygiene, such as input validation on all user-facing parameters, is not consistently implemented in the development lifecycle.

Further Reading

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