CVE-2025-2978: WCMS 11 RCE Vulnerability

CVE-2025-2978 Overview

CVE-2025-2978 is an unrestricted file upload vulnerability discovered in WCMS version 11. The vulnerability affects the Article Publishing Page component, specifically within the file upload functionality accessible via /index.php?articleadmin/upload/?&CKEditor=container&CKEditorFuncNum=1. This flaw allows authenticated attackers to upload arbitrary files without proper validation, potentially leading to remote code execution on the affected system.

Critical Impact

Successful exploitation allows remote attackers to upload malicious files to the server, potentially enabling arbitrary code execution and full system compromise.

Affected Products

• WCMS version 11.0
• WCMS Article Publishing Page component
• CKEditor integration module in WCMS

Discovery Timeline

• 2025-03-31 - CVE CVE-2025-2978 published to NVD
• 2025-10-09 - Last updated in NVD database

Technical Details for CVE-2025-2978

Vulnerability Analysis

This vulnerability is classified under CWE-434 (Unrestricted Upload of File with Dangerous Type) and CWE-284 (Improper Access Control). The flaw exists in the file upload handler integrated with CKEditor on the Article Publishing Page. The upload endpoint fails to properly validate or restrict the types of files that can be uploaded by authenticated users.

When a user with article publishing privileges accesses the upload functionality, the application does not enforce file type restrictions, allowing potentially dangerous file types such as PHP scripts to be uploaded to the server. If the uploaded files are stored in a web-accessible directory and executed by the web server, this could result in remote code execution.

Root Cause

The root cause of this vulnerability lies in the absence of proper file type validation within the upload handler. The application does not implement server-side checks to verify that uploaded files match an allowlist of safe file extensions or MIME types. Additionally, there appears to be insufficient access control mechanisms preventing lower-privileged users from exploiting this functionality.

Attack Vector

The vulnerability can be exploited remotely over the network by an authenticated attacker with low privileges. The attack requires no user interaction beyond the attacker's own actions.

The exploitation flow involves:

1. An attacker authenticates to the WCMS application with article publishing privileges
2. The attacker accesses the vulnerable upload endpoint at /index.php?articleadmin/upload/?&CKEditor=container&CKEditorFuncNum=1
3. The attacker uploads a malicious file (e.g., a PHP webshell) through the CKEditor file upload interface
4. If the file is stored in a web-accessible location, the attacker accesses it directly to execute arbitrary code on the server

Technical details and proof-of-concept information are available in the GitHub PoC Repository.

Detection Methods for CVE-2025-2978

Indicators of Compromise

• Suspicious file uploads with executable extensions (.php, .phtml, .phar, .jsp) in the WCMS upload directories
• Unexpected files appearing in web-accessible directories following article uploads
• Web server access logs showing requests to recently uploaded files with executable extensions
• Anomalous POST requests to /index.php?articleadmin/upload/ with unusual file content types

Detection Strategies

• Monitor web server logs for POST requests targeting the vulnerable upload endpoint with suspicious file extensions
• Implement file integrity monitoring on WCMS upload directories to detect unauthorized file creation
• Deploy web application firewall (WAF) rules to detect and block upload attempts with dangerous file types
• Review authentication logs for unusual login patterns followed by upload activity

Monitoring Recommendations

• Enable detailed logging for all file upload operations within the WCMS application
• Configure real-time alerting for new files created in upload directories with executable extensions
• Monitor for outbound connections originating from the web server process that may indicate webshell activity
• Implement periodic security audits of uploaded file directories to identify suspicious content

How to Mitigate CVE-2025-2978

Immediate Actions Required

• Restrict access to the Article Publishing Page to only trusted administrators until a patch is available
• Implement web server configuration to prevent execution of scripts in upload directories
• Review existing uploaded files for any malicious content and remove suspicious files
• Consider temporarily disabling the file upload functionality if not critical to operations

Patch Information

The vendor (WCMS) was contacted about this vulnerability but did not respond. As of the last NVD update on 2025-10-09, no official patch has been released. Organizations using WCMS 11 should consider implementing compensating controls or evaluating alternative CMS solutions.

For additional vulnerability details, refer to VulDB #302030 and VulDB CTI #302030.

Workarounds

• Configure the web server (Apache/Nginx) to disable script execution in upload directories using .htaccess or server configuration directives
• Implement application-level file type validation by modifying the upload handler to only accept safe file types (images, documents)
• Use a web application firewall to block requests containing file uploads with dangerous extensions
• Relocate the upload directory outside the web root and serve uploaded files through a controlled endpoint

# Apache configuration to disable PHP execution in uploads directory
# Add to .htaccess in the uploads directory or server config
<Directory /path/to/wcms/uploads>
    php_admin_flag engine off
    <FilesMatch "\.ph(p[3457]?|t|tml|ar)$">
        Require all denied
    </FilesMatch>
</Directory>