CVE-2025-39458: Foton Path Traversal Vulnerability

CVE-2025-39458 Overview

CVE-2025-39458 is an Improper Control of Filename for Include/Require Statement in PHP Program vulnerability (CWE-98) affecting the Mikado-Themes Foton WordPress theme. This vulnerability allows PHP Local File Inclusion (LFI), enabling attackers to include arbitrary local files on the server through manipulated input parameters. The vulnerability is classified as a PHP Remote File Inclusion weakness that manifests as a Local File Inclusion attack vector.

Critical Impact

Attackers can exploit this Local File Inclusion vulnerability to read sensitive configuration files, include malicious PHP code, potentially achieve remote code execution, and compromise the entire WordPress installation.

Affected Products

• Qodeinteractive Foton WordPress Theme versions up to and including 2.5.2
• WordPress installations using the Foton theme (cpe:2.3:a:qodeinteractive:foton:*:*:*:*:*:wordpress:*:*)

Discovery Timeline

• 2025-05-19 - CVE-2025-39458 published to NVD
• 2026-04-01 - Last updated in NVD database

Technical Details for CVE-2025-39458

Vulnerability Analysis

This vulnerability stems from improper validation and sanitization of user-supplied input in PHP include or require statements within the Foton WordPress theme. When user-controlled data is passed directly to PHP file inclusion functions without adequate filtering, attackers can manipulate file paths to include arbitrary files from the local file system.

Local File Inclusion vulnerabilities in WordPress themes are particularly dangerous because they can be exploited to:

• Read sensitive configuration files such as wp-config.php containing database credentials
• Access system files like /etc/passwd through directory traversal sequences
• Include uploaded files containing malicious PHP code, leading to remote code execution
• Expose private data stored on the server

The vulnerability affects Foton theme versions from the initial release through version 2.5.2, indicating a long-standing issue in the codebase.

Root Cause

The root cause of CVE-2025-39458 is the improper control of filename parameters used in PHP include() or require() statements. The Foton theme fails to properly sanitize user input before incorporating it into file path constructions, allowing path traversal sequences (such as ../) or direct file path references to be injected. This CWE-98 weakness occurs when developers trust user input without implementing proper validation, allowlist filtering, or path canonicalization.

Attack Vector

The attack vector for this Local File Inclusion vulnerability involves an attacker sending crafted HTTP requests containing malicious file path references. The attacker manipulates URL parameters or POST data that the vulnerable PHP code passes to file inclusion functions.

A typical LFI exploitation scenario in WordPress themes involves:

1. Identifying a parameter that accepts file path input
2. Injecting directory traversal sequences to escape the intended directory
3. Specifying a target file path to include sensitive system or application files
4. Potentially chaining with file upload functionality to achieve code execution

For detailed technical information about this vulnerability, refer to the Patchstack Foton Theme Vulnerability Advisory.

Detection Methods for CVE-2025-39458

Indicators of Compromise

• Unusual HTTP requests containing directory traversal patterns (../, ..%2f, ..%5c) targeting theme files
• Web server access logs showing requests to Foton theme endpoints with suspicious file path parameters
• Evidence of unauthorized access to sensitive configuration files or system files
• PHP error logs indicating file inclusion failures or access to unexpected file paths
• Presence of uploaded webshells or suspicious PHP files in theme directories

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in request parameters
• Monitor WordPress access logs for requests targeting Foton theme files with encoded path traversal sequences
• Deploy file integrity monitoring on WordPress installations to detect unauthorized file access or modifications
• Configure intrusion detection systems (IDS) to alert on LFI attack signatures targeting PHP applications

Monitoring Recommendations

• Enable detailed logging for PHP applications and review logs for file inclusion errors
• Set up alerts for access attempts to sensitive files like wp-config.php, /etc/passwd, or other critical system files
• Monitor for unusual patterns in theme directory file access
• Implement real-time monitoring of web server logs for exploitation attempts

How to Mitigate CVE-2025-39458

Immediate Actions Required

• Update the Foton WordPress theme to a patched version as soon as one becomes available from the vendor
• If no patch is available, consider temporarily deactivating and removing the Foton theme
• Review WordPress access logs for signs of exploitation attempts
• Audit file permissions and ensure sensitive files are not world-readable
• Implement WAF rules to block path traversal patterns targeting the vulnerable theme

Patch Information

No official patch information has been published at the time of this advisory. Users should monitor the Qodeinteractive vendor website and WordPress theme repository for security updates. The vulnerability affects all Foton theme versions through 2.5.2. For current status and remediation guidance, consult the Patchstack vulnerability database entry.

Workarounds

• Implement virtual patching through a Web Application Firewall (WAF) to block LFI attack patterns
• Switch to an alternative WordPress theme until a security patch is released
• Restrict access to the vulnerable theme files through server configuration
• Apply PHP open_basedir restrictions to limit file inclusion to specific directories

# Apache configuration to block common LFI patterns
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./|\.\.) [NC,OR]
    RewriteCond %{QUERY_STRING} (etc/passwd|etc/shadow|wp-config\.php) [NC]
    RewriteRule .* - [F,L]
</IfModule>