CVE-2025-52723: Networker Plugin LFI Vulnerability

CVE-2025-52723 Overview

CVE-2025-52723 is a Local File Inclusion (LFI) vulnerability affecting the Networker WordPress theme by codesupplyco. The vulnerability stems from improper control of filename parameters in PHP include/require statements, allowing attackers to include arbitrary local files on the server. This can lead to sensitive information disclosure, configuration file exposure, and potentially remote code execution if combined with other attack vectors.

Critical Impact

Attackers can exploit this LFI vulnerability to read sensitive files from the WordPress server, potentially exposing database credentials, configuration files, and other sensitive data that could facilitate further attacks.

Affected Products

• WordPress Networker Theme version 1.2.0 and earlier
• codesupplyco Networker Theme (all versions through 1.2.0)

Discovery Timeline

• 2025-06-27 - CVE-2025-52723 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-52723

Vulnerability Analysis

This vulnerability is classified under CWE-98 (Improper Control of Filename for Include/Require Statement in PHP Program). The Networker theme fails to properly validate and sanitize user-supplied input before using it in PHP file inclusion functions. When an application dynamically includes files based on user input without adequate validation, attackers can manipulate the file path to include unintended files from the local filesystem.

Local File Inclusion vulnerabilities in WordPress themes are particularly concerning because they can expose critical WordPress configuration files such as wp-config.php, which contains database credentials and authentication keys. In some scenarios, LFI can be escalated to Remote Code Execution through techniques like log poisoning or PHP filter chain exploitation.

Root Cause

The root cause of this vulnerability is insufficient input validation in the Networker theme's file inclusion logic. The theme accepts user-controlled parameters that are directly passed to PHP's include(), require(), include_once(), or require_once() functions without proper sanitization. This allows path traversal sequences (such as ../) to navigate the filesystem and include arbitrary files.

Attack Vector

The vulnerability can be exploited by manipulating request parameters that control file paths within the theme. An attacker would craft malicious requests containing path traversal sequences to access files outside the intended directory. Common targets include:

• /etc/passwd (on Linux servers) for user enumeration
• wp-config.php for database credentials and security keys
• Log files for potential log poisoning attacks
• PHP session files for session hijacking

The attack does not require authentication in typical scenarios, making it particularly dangerous for publicly accessible WordPress installations.

Detection Methods for CVE-2025-52723

Indicators of Compromise

• Unusual access patterns to theme files with path traversal sequences (../, ..%2f, ..%5c)
• Web server logs showing requests attempting to access sensitive files like /etc/passwd or wp-config.php
• Error logs indicating failed file inclusion attempts outside the web root
• Unexpected file read operations from the WordPress themes directory

Detection Strategies

• Monitor web application firewall (WAF) logs for path traversal patterns in requests targeting WordPress theme endpoints
• Implement file integrity monitoring on critical WordPress configuration files
• Review web server access logs for suspicious parameter values containing directory traversal sequences
• Deploy intrusion detection rules that alert on LFI attack patterns targeting the Networker theme

Monitoring Recommendations

• Enable detailed logging for PHP file operations and monitor for anomalous include/require calls
• Configure alerts for access attempts to sensitive system files from web application contexts
• Implement real-time monitoring of WordPress theme directory access patterns
• Utilize SentinelOne's Singularity platform to detect and respond to file-based attack indicators

How to Mitigate CVE-2025-52723

Immediate Actions Required

• Disable or remove the Networker theme if not actively required
• Implement Web Application Firewall (WAF) rules to block path traversal attempts
• Restrict PHP's open_basedir directive to limit file access to the WordPress installation directory
• Review and audit theme code for any user-supplied input used in file inclusion functions
• Monitor for updated versions of the Networker theme that address this vulnerability

Patch Information

At the time of publication, users should check the Patchstack Vulnerability Notice for the latest patch availability and remediation guidance. Contact codesupplyco for an updated version of the Networker theme that addresses this vulnerability. Until a patch is available, implement the workarounds described below.

Workarounds

• Configure PHP's open_basedir restriction to limit accessible directories to the WordPress root and required system paths
• Implement strict input validation using WordPress sanitization functions like sanitize_file_name() for any file-related parameters
• Deploy virtual patching through a WAF to filter malicious path traversal requests
• Consider switching to an alternative WordPress theme if the Networker theme is not essential

# PHP configuration hardening for open_basedir
# Add to php.ini or .htaccess (Apache with mod_php)
# Restricts PHP file operations to specified directories

# In php.ini:
open_basedir = /var/www/html/:/tmp/

# In .htaccess (Apache):
php_value open_basedir "/var/www/html/:/tmp/"

# Disable dangerous PHP functions
disable_functions = exec,passthru,shell_exec,system,proc_open,popen,curl_exec,curl_multi_exec