CVE-2026-24960: Charety File Upload Vulnerability

CVE-2026-24960 Overview

CVE-2026-24960 is an Unrestricted Upload of File with Dangerous Type vulnerability (CWE-434) affecting the Charety WordPress theme by zozothemes. This vulnerability allows attackers to upload malicious files to vulnerable WordPress installations, potentially leading to complete site compromise through arbitrary code execution.

The flaw exists due to insufficient file type validation in the theme's upload functionality, enabling attackers to bypass security restrictions and upload files with dangerous extensions such as PHP scripts that can be executed on the server.

Critical Impact

Attackers can upload and execute malicious files on vulnerable WordPress sites running the Charety theme, potentially leading to complete server compromise, data theft, and website defacement.

Affected Products

• zozothemes Charety WordPress Theme versions prior to 2.0.2

Discovery Timeline

• 2026-03-05 - CVE-2026-24960 published to NVD
• 2026-03-05 - Last updated in NVD database

Technical Details for CVE-2026-24960

Vulnerability Analysis

This vulnerability falls under the category of Unrestricted Upload of File with Dangerous Type (CWE-434). The Charety WordPress theme fails to properly validate file types during the upload process, allowing attackers to upload files with dangerous extensions that can be executed by the web server.

In WordPress themes, file upload functionality is commonly implemented for features like profile images, media galleries, or form submissions. When proper validation is not enforced, attackers can circumvent file type restrictions and upload executable scripts, typically PHP files, which can then be accessed directly via the web server to execute arbitrary code.

The exploitation of this vulnerability requires no authentication in many cases, as theme upload handlers may be accessible to unauthenticated users depending on the theme's configuration and the specific upload endpoint exposed.

Root Cause

The root cause of this vulnerability is the lack of proper file type validation and sanitization in the Charety theme's upload handling code. The theme does not adequately verify:

• File extension validation against a whitelist of safe extensions
• MIME type verification to ensure content matches declared type
• File content inspection to detect malicious payloads disguised as legitimate files

This allows attackers to upload PHP web shells or other malicious scripts that maintain their executable nature on the server.

Attack Vector

The attack can be executed remotely over the network. An attacker would identify the vulnerable upload endpoint in the Charety theme, then craft a malicious file (such as a PHP web shell) potentially disguised with a manipulated extension or content type. Once uploaded, the attacker accesses the uploaded file directly through the web server, causing the malicious code to execute with the privileges of the web server process.

The vulnerability allows attackers to upload malicious PHP files through the theme's file upload functionality. When these files are subsequently accessed via the web server, they execute with server-level privileges, enabling complete compromise of the WordPress installation.

For detailed technical information about this vulnerability, see the Patchstack WordPress Vulnerability Database.

Detection Methods for CVE-2026-24960

Indicators of Compromise

• Presence of unexpected PHP files in WordPress upload directories (wp-content/uploads/)
• Web shell signatures or obfuscated PHP code in recently uploaded files
• Unusual outbound network connections originating from the web server process
• Unexpected file modifications or new files with recent timestamps in theme directories
• Web server logs showing direct access to files in upload directories with PHP extensions

Detection Strategies

• Monitor file upload directories for new PHP files or files with double extensions (e.g., image.php.jpg)
• Implement file integrity monitoring on WordPress installations to detect unauthorized file additions
• Review web server access logs for suspicious requests to upload directories
• Deploy web application firewall (WAF) rules to detect and block malicious file upload attempts
• Scan uploaded files for known web shell signatures and malicious patterns

Monitoring Recommendations

• Enable WordPress debug logging to capture file upload events and errors
• Configure server-side monitoring to alert on new executable files in web directories
• Implement real-time file system monitoring on the wp-content/uploads/ directory
• Review authentication and access logs for patterns indicating exploitation attempts

How to Mitigate CVE-2026-24960

Immediate Actions Required

• Update the Charety WordPress theme to version 2.0.2 or later immediately
• Audit the wp-content/uploads/ directory for any suspicious or unexpected PHP files
• Implement server-side controls to prevent execution of PHP files in upload directories
• Review recent file upload activity for signs of exploitation

Patch Information

The vulnerability has been addressed in Charety theme version 2.0.2. Users should update to this version or later through the WordPress admin panel or by manually downloading the patched version from the theme vendor.

For additional details, refer to the Patchstack security advisory.

Workarounds

• Disable file upload functionality in the theme if not required for business operations
• Implement .htaccess rules to prevent PHP execution in upload directories
• Use a Web Application Firewall (WAF) to block malicious file upload attempts
• Restrict file uploads to authenticated and trusted users only

# Apache .htaccess configuration to prevent PHP execution in uploads directory
# Place this file in wp-content/uploads/.htaccess

<FilesMatch "\.(?:php|phtml|php3|php4|php5|php7|phps)$">
    Require all denied
</FilesMatch>

# Alternative: Disable PHP engine entirely in this directory
php_flag engine off