CVE-2025-39506: Nasa Core Path Traversal Vulnerability

CVE-2025-39506 Overview

CVE-2025-39506 is a PHP Local File Inclusion (LFI) vulnerability affecting the NasaTheme Nasa Core (nasa-core) WordPress plugin. The vulnerability stems from improper control of filename for include/require statements in PHP, classified under CWE-98. This flaw allows attackers to include arbitrary local files from the server, potentially leading to information disclosure, code execution, or complete site compromise.

Critical Impact

Attackers can exploit this vulnerability to read sensitive files from the server, including configuration files containing database credentials, or potentially achieve remote code execution through log poisoning or other chained attack techniques.

Affected Products

• NasaTheme Nasa Core (nasa-core) plugin versions through 6.3.2
• WordPress installations using the vulnerable plugin versions

Discovery Timeline

• 2025-05-23 - CVE-2025-39506 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-39506

Vulnerability Analysis

This vulnerability exists due to improper validation and sanitization of user-controlled input that is subsequently used in PHP include or require statements within the Nasa Core plugin. When user-supplied data is passed directly to file inclusion functions without adequate filtering, attackers can manipulate the file path to access files outside the intended directory structure.

Local File Inclusion vulnerabilities in WordPress plugins are particularly dangerous because they can expose sensitive WordPress configuration files such as wp-config.php, which contains database credentials, authentication keys, and other critical security information. Additionally, attackers may leverage LFI to read server logs or other files that can be used in conjunction with other techniques to achieve remote code execution.

Root Cause

The root cause of CVE-2025-39506 lies in the plugin's failure to properly validate and sanitize user input before using it in PHP's file inclusion mechanisms (include, include_once, require, or require_once). The Nasa Core plugin does not implement sufficient path traversal protections or whitelist-based validation for file inclusion operations, allowing attackers to inject directory traversal sequences (such as ../) to access arbitrary files on the filesystem.

Attack Vector

The attack vector for this vulnerability involves manipulating request parameters that control which PHP files are included by the plugin. An attacker can craft malicious requests containing path traversal sequences to navigate outside the intended directory and include sensitive files from the server's filesystem.

Typical exploitation involves:

1. Identifying the vulnerable parameter that accepts file path input
2. Injecting path traversal sequences (e.g., ../../../) to escape the plugin directory
3. Targeting sensitive files such as /etc/passwd, wp-config.php, or application logs
4. Potentially chaining with other vulnerabilities (such as log poisoning) to achieve code execution

For detailed technical analysis and proof-of-concept information, refer to the Patchstack WordPress Vulnerability Report.

Detection Methods for CVE-2025-39506

Indicators of Compromise

• Unusual HTTP requests containing path traversal sequences (../, ..%2f, %2e%2e/) targeting the Nasa Core plugin
• Web server access logs showing requests attempting to access sensitive system files through plugin endpoints
• Unexpected file access attempts to wp-config.php, /etc/passwd, or other sensitive files
• Error logs indicating failed file inclusion attempts with suspicious path patterns

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in requests
• Monitor web server access logs for requests containing encoded or double-encoded traversal sequences
• Deploy file integrity monitoring on critical WordPress configuration files
• Use intrusion detection systems (IDS) to identify LFI exploitation attempts

Monitoring Recommendations

• Enable verbose logging for the WordPress installation and web server
• Set up alerts for access attempts to sensitive files through unusual request paths
• Monitor for anomalous plugin behavior or unexpected file read operations
• Regularly review access logs for patterns consistent with LFI exploitation

How to Mitigate CVE-2025-39506

Immediate Actions Required

• Update the NasaTheme Nasa Core plugin to the latest patched version immediately
• Audit your WordPress installation to verify the current version of nasa-core
• Review web server logs for any signs of exploitation attempts
• Consider temporarily disabling the plugin if an update is not available

Patch Information

Users should update the NasaTheme Nasa Core plugin to a version newer than 6.3.2 where this vulnerability has been addressed. Check the official plugin repository or the Patchstack advisory for the latest security patches and version information.

Workarounds

• Implement Web Application Firewall rules to block requests containing path traversal patterns
• Restrict file system permissions to limit the web server's ability to read sensitive files
• Use PHP configuration settings such as open_basedir to restrict file access to specific directories
• Consider disabling the vulnerable plugin until a patch is applied

# Example: Add open_basedir restriction in PHP configuration
# Add to php.ini or WordPress-specific PHP configuration
open_basedir = /var/www/html/wordpress:/tmp

# Example: Apache mod_security rule to block path traversal
SecRule REQUEST_URI "@contains ../" "id:1001,phase:1,deny,status:403,msg:'Path Traversal Attempt Blocked'"