CVE-2026-91849
Received Received - Intake

Unrestricted File Upload in WuzhiCMS

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: VulDB

Description
A security flaw has been discovered in WuzhiCMS up to 4.1.0. This affects the function member::setAvatar of the file /index.php?m=member&f=user&v=setAvatar of the component Avatar Upload. The manipulation of the argument File results in unrestricted upload. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-91849
EUVD
EUVD-2026-78672

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wuzhicms wuzhicms to 4.1.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

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Executive Summary

This vulnerability is an unrestricted file upload flaw in WuzhiCMS versions up to 4.1.0. It exists in the member::setAvatar function via the /index.php?m=member&f=user&v=setAvatar endpoint. Attackers can exploit this by manipulating the File argument to upload malicious files remotely. The issue was reported but remains unaddressed by the project maintainers.

Impact Analysis

This flaw allows remote attackers to upload arbitrary files to the server. This could lead to remote code execution, malware distribution, or defacement of the website. Sensitive data may be exposed, and the system could be used as a pivot point for further attacks against the network.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR's integrity and confidentiality requirements. For HIPAA, it risks exposing protected health information, potentially leading to compliance violations and penalties. Organizations must address this to maintain regulatory compliance.

Mitigation Strategies

Immediately update WuzhiCMS to the latest version beyond 4.1.0 if available. If no update exists, disable the Avatar Upload feature in /index.php?m=member&f=user&v=setAvatar. Monitor network traffic for unusual file uploads to this endpoint. Restrict access to the member module if not required.

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