CVE-2026-61524
Received Received - Intake

Unrestricted File Upload in WebsiteBaker CMS Leads to RCE

Publication date: 2026-08-03

Last updated on: 2026-08-03

Assigner: VulnCheck

Description
WebsiteBaker CMS before 2.13.10 contains an unrestricted file upload vulnerability in the module installation feature that allows authenticated administrators to achieve remote code execution by uploading a crafted ZIP archive containing a PHP webshell alongside a valid info.php metadata file. Attackers can place the malicious archive through the module installation interface, causing the application to extract the webshell into a web-accessible modules/ subdirectory where it becomes immediately executable by any unauthenticated user via direct HTTP request.

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Meta Information

Published
2026-08-03
Last Modified
2026-08-03
Generated
2026-08-03
AI Q&A
2026-08-03
EPSS Evaluated
N/A
NVD
CVE-2026-61524
EUVD
EUVD-2026-52394

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
websitebaker cms to 2.13.10 (exc)

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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.

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Executive Summary

This vulnerability is an unrestricted file upload flaw in WebsiteBaker CMS versions before 2.13.10. Authenticated administrators can upload a malicious ZIP archive containing a PHP webshell and a valid info.php metadata file. The application extracts the archive into a web-accessible modules directory, allowing unauthenticated users to execute the webshell via direct HTTP requests.

Detection Guidance

Check for unexpected PHP files in the modules/ directory of WebsiteBaker installations. Look for recently modified files or directories with suspicious names. Review module installation logs for unauthorized ZIP archives containing info.php files.

Impact Analysis

An attacker could exploit this to gain remote code execution on your server, allowing them to take full control of your website, steal sensitive data, or use your server for further attacks. Even if you are not an administrator, if your site uses a vulnerable version, it could be compromised by an insider or stolen admin credentials.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR and HIPAA requirements for data protection and confidentiality. A breach may result in regulatory fines, legal liabilities, and reputational damage due to non-compliance with data security standards.

Mitigation Strategies

Upgrade WebsiteBaker CMS to version 2.13.10 or later. Remove any unauthorized modules or files from the modules/ directory. Restrict write permissions to the modules/ directory to prevent future unauthorized uploads.

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