CVE-2025-58925: Axiomthemes Neptunus Path Traversal Flaw

CVE-2025-58925 Overview

CVE-2025-58925 is a Local File Inclusion (LFI) vulnerability affecting the Axiomthemes Neptunus WordPress theme. The vulnerability stems from improper control of filename parameters used in PHP include/require statements, allowing attackers to include arbitrary local files on the server. This can lead to sensitive information disclosure, source code exposure, and potentially remote code execution when combined with other attack techniques.

Critical Impact

Unauthenticated attackers can exploit this LFI vulnerability to read sensitive configuration files, including wp-config.php, potentially exposing database credentials and authentication keys.

Affected Products

• Axiomthemes Neptunus WordPress Theme versions up to and including 1.0.11
• WordPress installations using the vulnerable Neptunus theme
• Websites running the Neptunus theme without additional input validation controls

Discovery Timeline

• 2025-12-18 - CVE-2025-58925 published to NVD
• 2026-01-20 - Last updated in NVD database

Technical Details for CVE-2025-58925

Vulnerability Analysis

This vulnerability is classified as CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program. The Neptunus WordPress theme fails to properly 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 filesystem.

The attack requires network access and can be executed without authentication. While the attack complexity is high due to the need for specific conditions to achieve full exploitation, successful attacks can result in complete compromise of confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of this vulnerability lies in insufficient input validation within the Neptunus theme's file inclusion logic. When processing user-controlled parameters, the theme does not adequately sanitize or validate the input before passing it to PHP's include(), require(), include_once(), or require_once() functions. This allows path traversal sequences (such as ../) to be injected, enabling attackers to reference files outside the intended directory scope.

Attack Vector

The vulnerability is exploitable over the network without requiring user interaction or prior authentication. An attacker can craft malicious HTTP requests containing path traversal sequences to include sensitive local files. Common targets include:

• /etc/passwd - User account information disclosure
• wp-config.php - WordPress database credentials and security keys
• /var/log/ files - Log file analysis for further attack planning
• PHP session files - Potential session hijacking

When combined with techniques like log poisoning or PHP filter chains, this LFI vulnerability can potentially escalate to Remote Code Execution (RCE).

The vulnerability can be exploited by manipulating theme parameters to traverse directory structures and include sensitive files. Attackers typically inject path traversal sequences such as ../../ combined with null bytes or encoding techniques to bypass basic filters. For detailed technical information, refer to the Patchstack vulnerability database.

Detection Methods for CVE-2025-58925

Indicators of Compromise

• Suspicious HTTP requests containing path traversal patterns (../, ..%2f, %2e%2e/) targeting theme files
• Unusual access patterns to the Neptunus theme directory endpoints
• Server logs showing attempts to access system files like /etc/passwd or wp-config.php through theme parameters
• PHP error logs indicating failed file inclusion attempts from unexpected directories

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in requests targeting WordPress themes
• Configure intrusion detection systems (IDS) to alert on LFI attack signatures
• Monitor access logs for requests containing encoded path traversal sequences (%2e%2e%2f, ..%252f)
• Deploy file integrity monitoring on critical WordPress configuration files

Monitoring Recommendations

• Enable verbose logging for PHP file inclusion errors
• Set up real-time alerting for suspicious patterns in web server access logs
• Monitor WordPress activity logs for unusual theme-related requests
• Implement endpoint detection solutions that can identify post-exploitation behavior following LFI attacks

How to Mitigate CVE-2025-58925

Immediate Actions Required

• Identify all WordPress installations using the Neptunus theme version 1.0.11 or earlier
• Consider temporarily disabling or replacing the Neptunus theme until a patched version is available
• Implement WAF rules to block path traversal attempts targeting the theme
• Review server logs for evidence of exploitation attempts

Patch Information

At the time of publication, users should monitor the Axiomthemes website and WordPress theme repository for security updates to the Neptunus theme. The vulnerability affects all versions through 1.0.11. Organizations should apply any available security patches immediately upon release and verify the patch addresses the file inclusion vulnerability.

For the latest patch status and additional details, consult the Patchstack advisory.

Workarounds

• Implement strict input validation at the web server level using ModSecurity or similar WAF solutions
• Restrict PHP's open_basedir directive to limit file access to the WordPress installation directory
• Configure disable_functions in php.ini to disable dangerous PHP functions if not required
• Apply the principle of least privilege to web server file permissions

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

# Restrict PHP file access to WordPress directory
php_admin_value open_basedir /var/www/html/wordpress/

# Disable dangerous functions
php_admin_value disable_functions "exec,passthru,shell_exec,system,proc_open,popen"