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The vulnerability CVE-2025-13815 exists in moxi159753 Mogu Blog v2 versions up to 5.2. It involves an unknown function within the /file/pictures endpoint that handles file uploads. The parameter ‘filedatas’ is used to accept file data from user requests. However, this function lacks proper validation mechanisms, allowing unrestricted upload of any file type without checks. Attackers can remotely send HTTP POST requests containing malicious files in the ‘filedatas’ field. Since no sanitization is performed, files like web shells or scripts can be uploaded directly to the server. This is due to insufficient input validation and absence of file extension filtering. The attack requires network access and low-privilege user credentials, but no user interaction. The publicly available exploit leverages this flaw to upload arbitrary code. Once uploaded, files may be stored in web-accessible directories, leading to potential arbitrary code execution. The vendor has not responded to disclosures, leaving systems unpatched. The CVSS 4.0 score of 5.3 indicates medium severity with impacts on confidentiality, integrity, and availability. The vulnerability stems from poor coding practices, emphasizing the need for secure file upload handling. Mitigation requires external controls as no patch is provided.
Platform: moxi159753 Mogu Blog
Version: up to 5.2
Vulnerability: Unrestricted upload
Severity: MEDIUM
date: 2025-12-01
Prediction: No patch expected
What Undercode Say:
Analytics:
curl -X POST -F “[email protected]” http://target/file/pictures
wget http://target/uploads/malicious.php
find /var/www -name “.php” -newer timestamp
How Exploit:
POST request with filedatas parameter. Upload webshell to server. Access file for execution.
Protection from this CVE
Implement file validation. Use extension allowlists. Restrict upload directory permissions.
Impact:
Arbitrary code execution. System compromise. Data breach.
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Sources:
Reported By: nvd.nist.gov
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