CVE-2025-69399: ThemeREX Cobble File Inclusion Vuln

CVE-2025-69399 Overview

CVE-2025-69399 is a Local File Inclusion (LFI) vulnerability affecting the ThemeREX Cobble WordPress theme. The vulnerability stems from improper control of filename for include/require statements in PHP, classified under CWE-98 (PHP Remote File Inclusion). This flaw allows attackers to include arbitrary local files on the server, potentially leading to sensitive information disclosure, configuration file exposure, or code execution through log file poisoning techniques.

Critical Impact

Attackers can exploit this LFI vulnerability to read sensitive files from the WordPress installation, including wp-config.php which contains database credentials, and potentially achieve remote code execution through advanced exploitation techniques.

Affected Products

• ThemeREX Cobble WordPress Theme version 1.7 and earlier
• WordPress installations using the Cobble theme

Discovery Timeline

• 2026-02-20 - CVE-2025-69399 published to NVD
• 2026-02-24 - Last updated in NVD database

Technical Details for CVE-2025-69399

Vulnerability Analysis

This vulnerability exists due to improper input validation in the ThemeREX Cobble WordPress theme when handling file inclusion operations. The theme fails to properly sanitize user-supplied input before passing it to PHP's include() or require() functions, allowing attackers to manipulate file paths and include arbitrary local files from the server's filesystem.

The network-based attack vector allows remote exploitation without requiring authentication, though the high attack complexity indicates that specific conditions must be met for successful exploitation. When successfully exploited, the vulnerability can compromise the confidentiality, integrity, and availability of the affected WordPress installation.

Root Cause

The root cause is the improper sanitization of user-controlled input used in PHP file inclusion operations. The Cobble theme accepts filename parameters that are directly or indirectly passed to PHP's include/require statements without adequate validation. This allows path traversal sequences such as ../ to be used to escape the intended directory and access files elsewhere on the filesystem.

Attack Vector

The vulnerability is exploitable over the network, requiring no authentication. An attacker can craft malicious HTTP requests containing path traversal sequences to include local files. Common attack patterns include:

• Accessing WordPress configuration files to obtain database credentials
• Reading system files such as /etc/passwd on Linux systems
• Including PHP files that contain user-controlled content (log poisoning) to achieve code execution
• Accessing backup files or other sensitive data stored on the server

The exploitation typically involves manipulating a vulnerable parameter to include a file path with directory traversal characters, bypassing the intended file restrictions in the theme's code.

Detection Methods for CVE-2025-69399

Indicators of Compromise

• Unusual HTTP requests containing path traversal sequences (../, ..%2f, %2e%2e/) targeting theme endpoints
• Web server access logs showing requests to Cobble theme files with suspicious parameters
• Attempts to access sensitive files like /etc/passwd or wp-config.php through theme parameters
• Unexpected file read operations in PHP error logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in requests
• Monitor web server logs for requests containing encoded or plain directory traversal sequences
• Deploy file integrity monitoring on critical WordPress files and configuration
• Use intrusion detection systems with signatures for LFI attack patterns

Monitoring Recommendations

• Enable verbose logging on WordPress and the web server to capture detailed request information
• Set up alerts for access attempts to sensitive system or WordPress configuration files
• Monitor for unusual theme file access patterns that deviate from normal user behavior
• Implement real-time log analysis to detect exploitation attempts promptly

How to Mitigate CVE-2025-69399

Immediate Actions Required

• Update the ThemeREX Cobble theme to a patched version as soon as one becomes available
• Implement WAF rules to block requests containing path traversal sequences
• Review web server access logs for signs of exploitation attempts
• Consider temporarily disabling or replacing the vulnerable theme until a patch is available
• Restrict file system permissions to limit the impact of potential LFI exploitation

Patch Information

Security details and patch information are available through the Patchstack Vulnerability Report. Organizations should monitor ThemeREX's official channels for security updates and apply patches immediately upon release.

Workarounds

• Deploy a Web Application Firewall with rules specifically blocking LFI patterns and path traversal attempts
• Implement PHP's open_basedir directive to restrict file access to the WordPress installation directory
• Use server-level restrictions to prevent access to sensitive system files
• Consider using a virtual patching solution through security plugins until an official patch is released
• Disable the Cobble theme and switch to an alternative theme if the risk is unacceptable

# Example PHP configuration to restrict file access
# Add to php.ini or .htaccess
open_basedir = /var/www/html/wordpress/
disable_functions = show_source, system, shell_exec, passthru, exec, popen, proc_open