CVE-2025-29002: Simen snssimen LFI Vulnerability

CVE-2025-29002 Overview

CVE-2025-29002 is a PHP Local File Inclusion (LFI) vulnerability affecting the snstheme Simen (snssimen) WordPress theme. The flaw stems from improper control of filenames used in PHP include or require statements [CWE-98]. Attackers can supply attacker-controlled paths to PHP file inclusion functions, causing the server to load unintended local files. Successful exploitation can disclose sensitive data, execute arbitrary PHP code via included files, and compromise the underlying WordPress site. The vulnerability affects all Simen theme versions from initial release through 4.6.

Critical Impact

Remote, unauthenticated attackers can trigger local file inclusion in the Simen WordPress theme, leading to information disclosure and potential code execution on the host.

Affected Products

• snstheme Simen (snssimen) WordPress theme
• All versions from initial release through 4.6
• WordPress sites running the vulnerable theme

Discovery Timeline

• 2025-06-17 - CVE-2025-29002 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-29002

Vulnerability Analysis

The Simen theme passes user-controlled input into PHP file inclusion functions without sufficient validation or allow-listing. PHP include, include_once, require, and require_once statements evaluate any included file as PHP code. When attackers control the path argument, they can reference arbitrary local files on the server. This category of flaw is tracked as [CWE-98] (Improper Control of Filename for Include/Require Statement). The Patchstack advisory classifies this specifically as Local File Inclusion, meaning remote inclusion of external URLs is not the primary attack path. Attackers commonly chain LFI with log poisoning, session file injection, or PHP wrappers such as php://filter to escalate to remote code execution.

Root Cause

The root cause is missing input validation on a parameter that flows into a PHP include statement inside the Simen theme codebase. The theme fails to restrict the included filename to a predefined allow-list or to sanitize directory traversal sequences such as ../. As a result, the include path resolves to attacker-chosen files outside the intended template directory.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction, though exploitation complexity is high. An attacker sends a crafted HTTP request to a vulnerable Simen theme endpoint, supplying a path parameter that points to a sensitive local file. The server then includes and executes the referenced file in the context of the PHP worker process.

No verified proof-of-concept code is publicly available. See the Patchstack WordPress Vulnerability advisory for additional technical context.

Detection Methods for CVE-2025-29002

Indicators of Compromise

• HTTP requests to Simen theme PHP files containing directory traversal sequences such as ../../
• Requests embedding PHP stream wrappers including php://filter, php://input, or data://
• Unexpected access to local files like /etc/passwd, wp-config.php, or PHP session files via theme endpoints
• Web server logs showing successful 200 OK responses to suspicious file path parameters targeting snssimen resources

Detection Strategies

• Inspect web server and WordPress access logs for query parameters containing path traversal patterns or PHP wrapper schemes
• Deploy a Web Application Firewall (WAF) rule that blocks include-style parameters referencing absolute paths or traversal sequences
• Correlate file system access events on the web host with HTTP requests to Simen theme files to detect anomalous reads of sensitive configuration files
• Monitor for unexpected PHP worker process reads of files outside the WordPress theme directory

Monitoring Recommendations

• Enable verbose access logging on the WordPress host and forward logs to a centralized analytics platform
• Alert on outbound connections from the PHP-FPM or Apache worker processes that follow suspicious include requests
• Track integrity of wp-config.php and other sensitive files for unauthorized read patterns
• Review Patchstack and WPScan vulnerability feeds for updates relating to the snssimen theme

How to Mitigate CVE-2025-29002

Immediate Actions Required

• Identify all WordPress installations running the Simen (snssimen) theme at version 4.6 or earlier
• Disable or switch away from the Simen theme until a vendor-supplied patched release is confirmed
• Apply WAF rules that block path traversal sequences and PHP stream wrappers in HTTP parameters targeting theme files
• Audit web server logs for prior exploitation attempts referencing the vulnerable endpoints

Patch Information

At the time of publication, the vendor advisory tracked through Patchstack confirms the issue affects Simen through version 4.6. Site administrators should consult the Patchstack WordPress Vulnerability advisory for the latest patched version information and apply the fixed release as soon as it is available from snstheme.

Workarounds

• Temporarily replace the Simen theme with a maintained alternative until a fixed version is published
• Restrict PHP open_basedir and allow_url_include settings to limit the scope of any file inclusion
• Apply virtual patching at the WAF layer to filter malicious include parameters
• Enforce least-privilege file system permissions so the PHP worker cannot read sensitive system files

# Example php.ini hardening to reduce LFI impact
allow_url_include = Off
allow_url_fopen = Off
open_basedir = "/var/www/html:/tmp"
disable_functions = "exec,passthru,shell_exec,system,proc_open,popen"