CVE-2025-69039: Bailly Theme File Inclusion Vulnerability

CVE-2025-69039 Overview

CVE-2025-69039 is a Local File Inclusion (LFI) vulnerability affecting the Bailly WordPress theme developed by goalthemes. This vulnerability stems from improper control of filename for include/require statements in PHP, allowing attackers to include arbitrary local files on the server. Successful exploitation could lead to sensitive information disclosure, configuration file exposure, or potential code execution if combined with other attack techniques.

Critical Impact

Attackers can exploit this LFI vulnerability to read sensitive files from the web server, potentially exposing database credentials, configuration files, and other sensitive data that could lead to full system compromise.

Affected Products

• Bailly WordPress Theme versions up to and including 1.3.4
• WordPress installations using the vulnerable Bailly theme

Discovery Timeline

• 2026-01-22 - CVE-2025-69039 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2025-69039

Vulnerability Analysis

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Bailly WordPress theme fails to properly validate and sanitize user-supplied input before using it in PHP include or require statements. This allows an attacker to manipulate file paths and include arbitrary local files from the server's filesystem.

Local File Inclusion vulnerabilities in PHP applications are particularly dangerous because they can expose sensitive configuration files such as wp-config.php, which contains database credentials, authentication keys, and salts. Additionally, if an attacker can upload a malicious file or leverage log file poisoning techniques, LFI can be escalated to Remote Code Execution.

Root Cause

The root cause of this vulnerability lies in the theme's improper handling of user-controlled input when constructing file paths for PHP's include() or require() functions. The application fails to implement proper input validation, sanitization, or whitelist-based filtering to restrict which files can be included. Without these security controls, attackers can traverse directories and include files outside the intended scope.

Attack Vector

The attack vector for this vulnerability involves manipulating parameters that control file inclusion within the Bailly theme. An attacker can craft malicious requests containing directory traversal sequences (such as ../) to navigate outside the web root and access sensitive system files.

The vulnerability can be exploited through HTTP requests to the vulnerable WordPress installation. By modifying the vulnerable parameter, attackers can include files like /etc/passwd on Linux systems or wp-config.php to extract database credentials. The attack does not require authentication, making it accessible to unauthenticated remote attackers.

For technical details regarding exploitation, refer to the Patchstack Vulnerability Details.

Detection Methods for CVE-2025-69039

Indicators of Compromise

• HTTP requests containing directory traversal patterns (../, ..%2f, ..%5c) targeting the Bailly theme endpoints
• Access log entries showing attempts to include sensitive files like /etc/passwd, wp-config.php, or php://filter wrapper usage
• Unusual file access patterns on the server originating from web server processes
• Error logs indicating failed file inclusion attempts with non-existent or restricted paths

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block directory traversal sequences in request parameters
• Monitor web server access logs for patterns indicative of LFI attempts, including ../ sequences and PHP wrapper usage
• Deploy file integrity monitoring to detect unauthorized access to sensitive configuration files
• Enable PHP error logging and monitor for file inclusion-related errors

Monitoring Recommendations

• Configure alerts for HTTP requests containing known LFI payloads targeting WordPress theme directories
• Monitor access to the wp-content/themes/bailly/ directory for suspicious activity patterns
• Implement real-time log analysis to identify repeated failed file access attempts
• Deploy endpoint detection solutions to monitor for unusual file read operations by web server processes

How to Mitigate CVE-2025-69039

Immediate Actions Required

• Update the Bailly WordPress theme to a patched version as soon as one becomes available from goalthemes
• If no patch is available, consider temporarily disabling or removing the Bailly theme
• Implement WAF rules to block directory traversal and LFI attack patterns
• Restrict file system permissions to limit the impact of potential exploitation
• Review server access logs for signs of previous exploitation attempts

Patch Information

As of the publication date, users should monitor the Patchstack Vulnerability Details page for updates on available patches. Contact goalthemes directly for information on patched versions of the Bailly theme. Until a patch is available, implement the workarounds below to reduce risk exposure.

Workarounds

• Deploy a Web Application Firewall with rules to block path traversal patterns in all request parameters
• Use PHP's open_basedir directive to restrict file inclusion to specific directories
• Implement a virtual patching solution to filter malicious requests before they reach the vulnerable application
• If the theme is not critical, deactivate it until an official patch is released
• Consider switching to an alternative WordPress theme that is actively maintained and security-audited

# Apache .htaccess configuration to help mitigate LFI attacks
# Add to WordPress root .htaccess file

# Block common LFI patterns
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./|\.\.%2f|\.\.%5c) [NC,OR]
RewriteCond %{QUERY_STRING} (php://|expect://|zip://|data:) [NC]
RewriteRule .* - [F,L]
</IfModule>

# Restrict direct access to theme PHP files
<FilesMatch "\.php$">
    <If "%{REQUEST_URI} =~ m#/wp-content/themes/bailly/.*\.php#">
        Require all denied
    </If>
</FilesMatch>