CVE-2026-25380: Feedy WordPress Theme LFI Vulnerability

CVE-2026-25380 Overview

CVE-2026-25380 is a PHP Local File Inclusion (LFI) vulnerability affecting the Feedy WordPress theme developed by jwsthemes. The vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files from the server filesystem. This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program).

Critical Impact

Attackers can exploit this vulnerability to read sensitive server files, potentially exposing configuration data, credentials, or other sensitive information. In certain configurations, this could lead to remote code execution through log poisoning or other advanced exploitation techniques.

Affected Products

• Feedy WordPress Theme versions prior to 2.1.5
• WordPress installations running vulnerable Feedy theme versions

Discovery Timeline

• 2026-03-25 - CVE-2026-25380 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-25380

Vulnerability Analysis

This vulnerability occurs due to insufficient input validation and sanitization of user-controlled parameters that are subsequently used in PHP file inclusion functions such as include(), include_once(), require(), or require_once(). When an attacker can manipulate the filename parameter passed to these functions, they can traverse the directory structure and include arbitrary files from the server's filesystem.

The Feedy WordPress theme fails to properly validate and sanitize user input before using it in file inclusion operations. This allows attackers to use path traversal sequences (such as ../) to escape the intended directory and access files elsewhere on the server. The vulnerability is accessible over the network without requiring authentication, though exploitation requires specific conditions to be met.

Root Cause

The root cause of CVE-2026-25380 is the lack of proper input validation and sanitization in the Feedy theme's PHP code. The theme accepts user-supplied input that directly influences file paths used in PHP include/require statements without adequately filtering or restricting the input to safe values. This violates the principle of least privilege and fails to implement proper allowlisting of permitted file paths.

Attack Vector

The vulnerability is exploitable over the network (Network attack vector) without user interaction. An attacker can craft malicious requests containing path traversal sequences to manipulate which files are included by the vulnerable PHP code. Successful exploitation could allow an attacker to:

1. Read sensitive configuration files such as wp-config.php
2. Access system files like /etc/passwd on Linux servers
3. Potentially achieve code execution through techniques like log poisoning or PHP wrapper abuse
4. Extract database credentials and other sensitive information

The vulnerability mechanism involves manipulating URL parameters or request data that the Feedy theme uses to dynamically include PHP files. By injecting path traversal sequences, an attacker can redirect the inclusion to arbitrary files. For detailed technical information, refer to the Patchstack security advisory.

Detection Methods for CVE-2026-25380

Indicators of Compromise

• HTTP requests containing path traversal sequences (../, ..%2f, %2e%2e/) targeting Feedy theme files
• Unusual file access patterns in web server logs involving system files or WordPress configuration files
• Error logs showing failed file inclusion attempts or PHP warnings about file operations
• Requests attempting to access files outside the expected theme directory structure

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in requests to WordPress theme endpoints
• Monitor web server access logs for requests containing encoded or unencoded directory traversal sequences
• Configure intrusion detection systems to alert on attempts to access sensitive files like wp-config.php or system files
• Deploy file integrity monitoring on critical WordPress and system configuration files

Monitoring Recommendations

• Enable detailed logging for all requests to the WordPress wp-content/themes/feedy/ directory
• Set up alerts for any HTTP 200 responses to requests containing path traversal indicators
• Monitor for unusual patterns in PHP error logs that may indicate exploitation attempts
• Track changes to WordPress configuration files and unexpected file access patterns

How to Mitigate CVE-2026-25380

Immediate Actions Required

• Update the Feedy WordPress theme to version 2.1.5 or later immediately
• If immediate patching is not possible, temporarily disable or remove the Feedy theme
• Review web server logs for signs of exploitation attempts
• Verify the integrity of sensitive configuration files, particularly wp-config.php
• Rotate database credentials and WordPress security keys as a precautionary measure

Patch Information

The vulnerability has been addressed in Feedy theme version 2.1.5. Site administrators should update to this version or later through the WordPress admin dashboard or by manually downloading the patched version from the theme vendor. The patch implements proper input validation and sanitization to prevent path traversal attacks. For more information, consult the Patchstack vulnerability database entry.

Workarounds

• Implement a Web Application Firewall (WAF) with rules blocking path traversal patterns
• Use WordPress security plugins that provide virtual patching capabilities
• Restrict PHP open_basedir to limit file inclusion to the WordPress installation directory
• Consider temporarily switching to an alternative theme until the update can be applied

# PHP configuration to restrict file access (php.ini or .htaccess)
# Add to php.ini or use php_admin_value in Apache configuration
open_basedir = /var/www/html/wordpress/

# Apache .htaccess rule to block path traversal attempts
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./|\.\.%2f) [NC,OR]
    RewriteCond %{REQUEST_URI} (\.\./|\.\.%2f) [NC]
    RewriteRule .* - [F,L]
</IfModule>