CVE-2025-2294: Kubio AI Page Builder Path Traversal Flaw

CVE-2025-2294 Overview

The Kubio AI Page Builder plugin for WordPress contains a critical Local File Inclusion (LFI) vulnerability affecting all versions up to and including 2.5.1. This security flaw exists within the kubio_hybrid_theme_load_template function, which fails to properly validate user-supplied input before including files. The vulnerability allows unauthenticated attackers to include and execute arbitrary files on the server, potentially leading to complete system compromise.

Critical Impact

Unauthenticated attackers can achieve remote code execution by leveraging file inclusion to execute malicious PHP code, bypass access controls, and exfiltrate sensitive data from WordPress installations.

Affected Products

• Kubio AI Page Builder plugin for WordPress versions ≤ 2.5.1
• WordPress installations with vulnerable Kubio plugin versions
• Web servers hosting affected WordPress sites

Discovery Timeline

• 2025-03-28 - CVE-2025-2294 published to NVD
• 2025-03-28 - Last updated in NVD database

Technical Details for CVE-2025-2294

Vulnerability Analysis

This Local File Inclusion vulnerability stems from improper input validation in the kubio_hybrid_theme_load_template function located in the plugin's editor hooks component. The function accepts user-controllable input that specifies a file path for template loading without adequate sanitization or path validation. This architectural weakness allows attackers to manipulate the file path parameter to traverse directories and include arbitrary files from the server's filesystem.

The vulnerability is particularly dangerous because it requires no authentication to exploit, meaning any remote attacker can target affected WordPress sites. When successfully exploited, an attacker can include PHP files containing malicious code, which the server will then execute in the context of the web application. This can lead to complete server compromise, data theft, and lateral movement within the hosting environment.

Root Cause

The root cause of CVE-2025-2294 is a Path Traversal vulnerability (CWE-22) in the kubio_hybrid_theme_load_template function. The function fails to implement proper input validation and path canonicalization, allowing directory traversal sequences like ../ to escape the intended template directory. Additionally, the function does not restrict the types of files that can be included, enabling the execution of PHP code from uploaded files or system files.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker can exploit this vulnerability by crafting a malicious HTTP request that targets the vulnerable template loading functionality. By manipulating the template path parameter, attackers can traverse the directory structure to include files outside the intended template directory.

The exploitation can be chained with file upload capabilities to achieve code execution. An attacker first uploads a file containing PHP code disguised as a legitimate file type (such as an image), then uses the LFI vulnerability to include and execute that uploaded file. This technique bypasses typical upload restrictions that only check file extensions rather than file content.

Attackers can also leverage this vulnerability to read sensitive configuration files like wp-config.php, which contains database credentials and authentication keys, or to include system files that may expose server configurations.

Detection Methods for CVE-2025-2294

Indicators of Compromise

• Unusual HTTP requests containing path traversal sequences (../) targeting Kubio plugin endpoints
• Web server access logs showing requests to editor-hooks.php with suspicious template parameters
• Unexpected file access patterns in web application logs, particularly reads of configuration files
• PHP execution errors in logs indicating attempts to include non-existent or inaccessible files

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block path traversal patterns in request parameters
• Monitor HTTP request logs for anomalous patterns targeting the Kubio plugin's template loading functionality
• Implement file integrity monitoring on sensitive WordPress configuration files
• Configure intrusion detection systems to alert on LFI exploitation attempts

Monitoring Recommendations

• Enable detailed logging for WordPress plugin activity and review logs regularly for suspicious template loading requests
• Set up alerts for access attempts to sensitive files like wp-config.php from web application contexts
• Monitor for unexpected PHP process spawning or unusual file read operations
• Review web server error logs for failed file inclusion attempts that may indicate reconnaissance activity

How to Mitigate CVE-2025-2294

Immediate Actions Required

• Update the Kubio AI Page Builder plugin to a version newer than 2.5.1 immediately
• If unable to update, temporarily deactivate and remove the Kubio plugin until a secure version is available
• Review web server logs for indicators of past exploitation attempts
• Conduct a security assessment to determine if the vulnerability has been exploited on your systems

Patch Information

Organizations should update the Kubio AI Page Builder plugin to the latest available version that addresses this vulnerability. The vulnerable code is located in lib/integrations/third-party-themes/editor-hooks.php at line 32. For technical details on the vulnerable code, refer to the WordPress Plugin Repository. Additional vulnerability information is available in the Wordfence Vulnerability Report.

Workarounds

• Implement a Web Application Firewall rule to block requests containing path traversal patterns targeting the Kubio plugin
• Restrict file system permissions to limit which files the web server process can read
• Apply PHP configuration hardening by enabling open_basedir to restrict file inclusion to the WordPress directory
• Consider using virtual patching through security plugins like Wordfence until an official patch can be applied

# Example Apache .htaccess rule to block path traversal attempts
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./|\.\.\\) [NC,OR]
    RewriteCond %{REQUEST_URI} (\.\./|\.\.\\) [NC]
    RewriteRule .* - [F,L]
</IfModule>