CVE-2025-69126: Fortius Path Traversal Vulnerability

CVE-2025-69126 Overview

CVE-2025-69126 is an unauthenticated Local File Inclusion (LFI) vulnerability affecting the Fortius WordPress theme in versions up to and including 2.3.0. The flaw is categorized under [CWE-98] (Improper Control of Filename for Include/Require Statement in PHP Program). Attackers can request the theme over the network without authentication and coerce it into including arbitrary local files. Successful exploitation enables disclosure of sensitive server-side content and, depending on server configuration, code execution paths through log poisoning or inclusion of attacker-controlled files.

Critical Impact
Unauthenticated remote attackers can include arbitrary local files on WordPress sites running the Fortius theme, leading to source code disclosure, credential exposure, and potential remote code execution.

Affected Products

Fortius WordPress theme versions <= 2.3.0
WordPress sites with the Fortius theme installed and active
Hosting environments exposing PHP file inclusion through theme template parameters

Discovery Timeline

2026-06-17 - CVE-2025-69126 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-69126

Vulnerability Analysis

The vulnerability resides in the Fortius theme's handling of file paths passed to PHP include or require statements. The theme accepts user-controlled input and uses it to construct a path that is loaded by the PHP interpreter. Because the input is neither validated against an allowlist nor sanitized for traversal sequences, attackers can reference files outside the intended template directory. The issue is exploitable without any authentication, meaning any anonymous network client can trigger the inclusion. The Exploit Prediction Scoring System places the probability of exploitation at 0.348% with a percentile of 26.525, but the attack surface is broad because WordPress themes are exposed to the public internet by default.

Root Cause

The root cause is improper control of a filename passed to a PHP file inclusion function, classified as [CWE-98]. The theme does not constrain user-supplied path values to a known set of safe templates and does not strip directory traversal sequences such as ../. As a result, the include directive resolves to attacker-chosen paths on the host filesystem.

Attack Vector

The attack vector is network-based and requires no privileges or user interaction. An attacker sends a crafted HTTP request to a Fortius-powered endpoint, supplying a parameter that references a local file path. The PHP interpreter then includes the referenced file in the response context. Targets typically include wp-config.php, system files such as /etc/passwd, and web server log files that can be poisoned to achieve code execution. See the Patchstack Fortius Theme Vulnerability advisory for additional technical context.

Detection Methods for CVE-2025-69126

Indicators of Compromise

HTTP requests to Fortius theme endpoints containing directory traversal sequences such as ../, ..%2f, or encoded variants
Requests referencing sensitive paths including wp-config.php, /etc/passwd, /proc/self/environ, or web server access logs
Unexpected outbound responses containing PHP source code or configuration data from the WordPress installation

Detection Strategies

Inspect web server and WordPress access logs for query parameters passed to Fortius theme files that contain path traversal patterns or absolute file paths
Deploy Web Application Firewall (WAF) rules targeting LFI payload signatures on requests routed to /wp-content/themes/fortius/
Correlate anomalous PHP file inclusion errors in PHP-FPM or Apache error logs with the source IP making the requests

Monitoring Recommendations

Enable verbose logging on PHP include and require failures to capture path traversal attempts
Monitor file integrity of wp-config.php and other sensitive files for unexpected read activity
Track repeated 200-status responses from theme endpoints that return atypical content lengths consistent with file disclosure

How to Mitigate CVE-2025-69126

Immediate Actions Required

Deactivate the Fortius theme on any WordPress site running version 2.3.0 or earlier until a patched release is confirmed
Apply WAF rules that block path traversal sequences and absolute file path parameters reaching theme files
Rotate WordPress database credentials, secret keys, and salts in wp-config.php if exploitation is suspected

Patch Information

At the time of publication, the Patchstack advisory lists the vulnerability as affecting versions up to and including 2.3.0. Administrators should consult the vendor channel for an updated theme release and upgrade as soon as a fixed version becomes available.

Workarounds

Restrict access to the WordPress site or the affected theme paths using server-level access controls until a patch is deployed
Configure PHP open_basedir to restrict file inclusion to the WordPress document root, reducing the scope of accessible files
Replace the Fortius theme with an alternative theme that does not exhibit the file inclusion behavior

bash

# Configuration example: restrict PHP file access via open_basedir in php.ini
open_basedir = "/var/www/html/:/tmp/"

# Example Apache rule to block traversal sequences against the Fortius theme
<LocationMatch "/wp-content/themes/fortius/">
    RewriteEngine On
    RewriteCond %{QUERY_STRING} (\.\./|\.\.%2f|/etc/passwd|wp-config) [NC]
    RewriteRule .* - [F,L]
</LocationMatch>