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CVE-2025-3551: Critical Unrestricted File Upload Vulnerability in Lingxing ERP 2

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Overview

A critical vulnerability, identified as CVE-2025-3551, has been discovered in Lingxing ERP 2. This vulnerability allows unrestricted file upload due to a flaw in the DoUpload function of the /Api/FileUpload.ashx?method=DoUpload file. If exploited, this vulnerability could potentially compromise systems or lead to data leakage, affecting any organization that uses this software.

Vulnerability Summary

CVE ID: CVE-2025-3551
Severity: Critical (7.3 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage

Affected Products

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Product | Affected Versions

Lingxing ERP 2 | All versions

How the Exploit Works

The vulnerability resides in the DoUpload function of the /Api/FileUpload.ashx?method=DoUpload file. An attacker can manipulate the File argument to allow unrestricted upload of files. This can lead to the upload of malicious files, which could potentially allow remote code execution or data leakage.

Conceptual Example Code

Here is a conceptual representation of how the vulnerability might be exploited:

POST /Api/FileUpload.ashx?method=DoUpload HTTP/1.1
Host: target.example.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
------WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="file"; filename="malicious_file.exe"
Content-Type: application/octet-stream
<contents of malicious_file.exe>
------WebKitFormBoundary7MA4YWxkTrZu0gW--

This example shows a malicious executable file being uploaded to the server via the vulnerable endpoint. Note that the actual payload would be specific to the attacker’s objectives and the system’s configuration.

Mitigation

As the vendor has not responded to the disclosure of this vulnerability, users are advised to apply a patch from the vendor if and when it becomes available. Until then, employing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation against potential attacks exploiting 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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