CVE-2025-68543: Diza Theme PHP File Inclusion Vulnerability

CVE-2025-68543 Overview

CVE-2025-68543 is a Local File Inclusion (LFI) vulnerability affecting the Diza WordPress theme developed by thembay. This vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files from the server's filesystem. The vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program).

An unauthenticated attacker can exploit this flaw to read sensitive files from the web server, potentially exposing configuration files containing database credentials, API keys, and other sensitive information. In certain configurations, this vulnerability could be chained with other techniques to achieve remote code execution.

Critical Impact

Unauthenticated attackers can read sensitive server files including wp-config.php, potentially exposing database credentials and allowing further compromise of WordPress installations.

Affected Products

• Diza WordPress Theme versions 1.3.15 and earlier
• WordPress installations using the Diza theme by thembay
• Web servers hosting vulnerable Diza theme installations

Discovery Timeline

• 2026-02-20 - CVE CVE-2025-68543 published to NVD
• 2026-02-24 - Last updated in NVD database

Technical Details for CVE-2025-68543

Vulnerability Analysis

This Local File Inclusion vulnerability exists due to insufficient input validation in the Diza WordPress theme's PHP code. 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.

When exploited, an attacker can traverse the directory structure using path traversal sequences (e.g., ../) to access files outside the intended directory scope. This enables reading of sensitive configuration files such as wp-config.php, .htaccess, and system files like /etc/passwd on Linux systems.

The vulnerability requires network access and can be exploited without authentication, though the attack complexity is considered elevated due to the specific conditions required for successful exploitation.

Root Cause

The root cause of this vulnerability is the improper handling of user-controlled input in PHP include/require statements. The Diza theme accepts filename parameters from user requests and incorporates them into file inclusion operations without adequate validation or sanitization. This allows malicious actors to inject path traversal sequences that break out of the intended directory context.

The vulnerable code path fails to implement proper allowlisting of permitted files, does not sanitize directory traversal characters, and lacks proper input validation before file inclusion operations are performed.

Attack Vector

The attack is executed over the network, requiring no authentication or user interaction. An attacker sends a specially crafted HTTP request to the vulnerable WordPress installation containing path traversal sequences in a parameter processed by the Diza theme's file inclusion logic.

The vulnerability mechanism works as follows: the attacker identifies the vulnerable parameter, constructs a malicious request with traversal sequences targeting sensitive files such as ../../../wp-config.php or ../../../etc/passwd, and the server processes the request and includes the specified file, returning its contents to the attacker.

For detailed technical information about the exploitation mechanism, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-68543

Indicators of Compromise

• Web server logs showing requests with path traversal sequences (e.g., ../, ..%2f, %2e%2e/)
• Unusual access patterns to theme files from external IP addresses
• Error logs indicating failed file inclusion attempts from unexpected directories
• Requests containing null bytes or encoding variations targeting PHP files

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block path traversal attempts in HTTP requests
• Implement intrusion detection signatures monitoring for LFI attack patterns targeting WordPress themes
• Enable detailed logging on WordPress installations and monitor for suspicious file access patterns
• Configure file integrity monitoring to detect unauthorized access to sensitive configuration files

Monitoring Recommendations

• Monitor web server access logs for requests containing ../ sequences or URL-encoded equivalents
• Set up alerts for failed file access attempts outside the web root directory
• Track authentication failures and unusual request patterns from single IP addresses
• Review server error logs for PHP file inclusion warnings or errors

How to Mitigate CVE-2025-68543

Immediate Actions Required

• Update the Diza WordPress theme to the latest patched version immediately
• Audit WordPress installations to identify all instances using the vulnerable Diza theme
• Implement WAF rules to block path traversal attempts targeting the WordPress installation
• Review server access logs for evidence of exploitation attempts
• Consider temporarily disabling the Diza theme until a patch is applied

Patch Information

Organizations using the Diza WordPress theme should update to the latest available version that addresses this vulnerability. Check the theme developer's official channels or the WordPress theme repository for the security update. For detailed patch information, consult the Patchstack Vulnerability Report.

Workarounds

• Deploy a Web Application Firewall configured to block path traversal attempts and LFI attack patterns
• Restrict PHP's open_basedir directive to limit file access to the WordPress installation directory
• Configure PHP's allow_url_include to Off to prevent remote file inclusions
• Implement file permission hardening to restrict web server access to sensitive files
• Consider using a security plugin like Wordfence or Sucuri to add additional protection layers

# PHP configuration hardening example
# Add to php.ini or .htaccess

# Restrict PHP file access to specific directories
php_value open_basedir "/var/www/html/wordpress/"

# Disable remote file inclusion
php_flag allow_url_include Off

# Disable URL fopen wrappers
php_flag allow_url_fopen Off