CVE-2025-39476: Revo Path Traversal Vulnerability

CVE-2025-39476 Overview

CVE-2025-39476 is a PHP Local File Inclusion (LFI) vulnerability in the Magentech Revo WordPress theme. The flaw stems from improper control of filenames passed to PHP include or require statements [CWE-98]. Attackers can manipulate file path parameters to load arbitrary local PHP files within the WordPress installation. Successful exploitation can lead to disclosure of sensitive configuration files, execution of attacker-controlled PHP, and full compromise of the underlying site. The vulnerability affects all Revo theme versions up to and including 4.0.26.

Critical Impact

Unauthenticated attackers can include local PHP files, leading to information disclosure and potential remote code execution on affected WordPress sites.

Affected Products

• Magentech Revo WordPress Theme versions n/a through <= 4.0.26

Discovery Timeline

• 2025-06-09 - CVE-2025-39476 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-39476

Vulnerability Analysis

The Revo theme contains a code path that passes user-controllable input directly into a PHP file inclusion function such as include, require, include_once, or require_once. Because the input is not constrained to a safe allow-list or sanitized against directory traversal sequences, an attacker can supply a relative path that resolves to an arbitrary .php file on the server.

When the included file executes within the theme's request context, attacker-influenced code runs with the privileges of the PHP worker process. This typically grants read access to wp-config.php, theme and plugin source, and other server-side files. Chained with file upload primitives or log poisoning, LFI frequently escalates to remote code execution.

The CWE-98 classification reflects the underlying weakness: filename input flowing into an inclusion sink without sufficient validation.

Root Cause

The root cause is missing validation on a request parameter that is concatenated into a path argument of a PHP inclusion statement inside the Revo theme code. The theme does not enforce an allow-list of permitted template names, does not strip traversal sequences such as ../, and does not apply realpath() containment checks before inclusion.

Attack Vector

Exploitation occurs over the network against an HTTP endpoint exposed by the theme. The CVSS vector indicates user interaction is required, suggesting the attack is delivered through a crafted URL that a site visitor or administrator must load. No authentication is required. See the Patchstack advisory for the Revo theme for additional technical context.

Detection Methods for CVE-2025-39476

Indicators of Compromise

• HTTP requests to Revo theme endpoints containing path traversal sequences such as ../, encoded variants like %2e%2e%2f, or null-byte injection patterns.
• Web server access logs showing requests with parameter values referencing wp-config.php, /etc/passwd, or php://filter wrappers.
• Unexpected PHP errors in logs referencing include() or require() failures with attacker-controlled paths.

Detection Strategies

• Inspect WordPress and web server logs for query parameters whose values contain file paths or PHP stream wrappers targeting Revo theme files.
• Deploy web application firewall rules that flag LFI patterns against /wp-content/themes/revo/ request paths.
• Correlate PHP execution telemetry with file reads of sensitive configuration files originating from the web server user.

Monitoring Recommendations

• Enable verbose access logging on the WordPress front-end and forward logs to a centralized analytics platform for retroactive hunting.
• Alert on outbound connections from the web server immediately following suspicious theme requests, which may indicate post-exploitation activity.
• Track integrity of wp-config.php and theme directories to detect tampering after potential LFI exploitation.

How to Mitigate CVE-2025-39476

Immediate Actions Required

• Identify all WordPress installations running the Magentech Revo theme and confirm version 4.0.26 or earlier.
• Apply the vendor patch as soon as a fixed release is available from Magentech or Patchstack mitigation guidance.
• Place affected sites behind a web application firewall with LFI signatures enabled until patched.
• Rotate WordPress secrets, database credentials, and API keys if exploitation is suspected.

Patch Information

At time of publication, refer to the Patchstack Revo theme advisory for the latest fixed version. Update the Revo theme to a release later than 4.0.26 once published by the vendor.

Workarounds

• Restrict PHP open_basedir to the WordPress document root to limit which files the inclusion sink can reach.
• Disable PHP stream wrappers such as phar://, php://filter, and data:// via disable_functions or php.ini hardening where feasible.
• Temporarily disable or replace the Revo theme until a patched version is installed.

# Example php.ini hardening
open_basedir = "/var/www/html:/tmp"
allow_url_include = Off
allow_url_fopen = Off