CVE-2026-78478: WordPress Mane Theme RCE Vulnerability

CVE-2026-78478 Overview

The Mane theme for WordPress contains a Local File Inclusion (LFI) vulnerability affecting all versions up to and including 1.7. Unauthenticated attackers can include and execute arbitrary files on the server through the vulnerable theme code. Successful exploitation allows execution of any PHP code in the included files, bypassing access controls and exposing sensitive data. Attackers can achieve remote code execution when file types such as images can be uploaded and subsequently included. The vulnerability is categorized under CWE-98, improper control of filename for include/require statements in PHP programs.

Critical Impact
Unauthenticated remote attackers can execute arbitrary PHP code on affected WordPress sites running the Mane theme versions 1.7 and earlier.

Affected Products

Mane theme for WordPress, all versions up to and including 1.7
WordPress sites distributing the theme via ThemeForest Portfolio Theme
Any deployment permitting upload of image or other file types combined with theme inclusion

Discovery Timeline

2026-08-25 - CVE-2026-78478 published to NVD
2026-08-26 - Last updated in NVD database

Technical Details for CVE-2026-78478

Vulnerability Analysis

The Mane theme fails to sanitize user-controlled input before passing it to a PHP file inclusion function such as include, require, include_once, or require_once. This flaw is classified as [CWE-98], improper control of filename for include/require statements. An unauthenticated attacker can supply a crafted file path parameter that resolves to a local file on the server. The PHP interpreter then loads and executes the referenced file within the theme's execution context.

The vulnerability affects confidentiality, integrity, and availability. Attackers can read configuration files containing database credentials, disclose source code, or escalate to full remote code execution. When combined with an upload primitive that accepts images or other permissive file types, the attacker writes PHP payloads inside those files and includes them via the vulnerable parameter.

Root Cause

The root cause is unsafe use of a filename variable in a PHP inclusion statement without allow-list validation. The theme accepts a request parameter and forwards it directly into an include or require call. No canonicalization, extension checking, or directory restriction is applied.

Attack Vector

The attack vector is the network. An attacker sends an HTTP request to the WordPress site with a manipulated parameter referencing a local file path. No authentication or user interaction is required. The high attack complexity reflects conditions such as needing to locate an uploadable file or a suitable local file to include for code execution.

See the Wordfence Vulnerability Report for additional technical details.

Detection Methods for CVE-2026-78478

Indicators of Compromise

HTTP requests to WordPress endpoints containing path traversal sequences such as ../ or absolute file paths in query parameters
Unexpected PHP execution originating from wp-content/uploads/ directories
New or modified PHP files, image files with embedded PHP tags, or web shells in upload directories
Access log entries referencing sensitive files such as wp-config.php, /etc/passwd, or /proc/self/environ

Detection Strategies

Inspect web server access logs for parameter values containing file path characters and known LFI payload patterns
Deploy a Web Application Firewall (WAF) rule set that blocks path traversal and LFI signatures for WordPress themes
Perform integrity monitoring on the WordPress installation, especially the wp-content/themes/mane directory and upload directories
Correlate anomalous outbound connections from the PHP worker process with recent inbound requests to theme files

Monitoring Recommendations

Enable verbose PHP error logging to capture failed include calls that reveal exploitation attempts
Monitor for creation of PHP files inside media upload directories where PHP execution should not occur
Alert on requests to theme PHP files with query strings referencing filesystem paths

How to Mitigate CVE-2026-78478

Immediate Actions Required

Deactivate and remove the Mane theme from any WordPress installation running version 1.7 or earlier until a patched release is verified
Restrict PHP execution inside wp-content/uploads/ using web server configuration to prevent inclusion of uploaded files as code
Review upload directories and the theme folder for planted web shells and remove any unauthorized files
Rotate WordPress secrets, database credentials, and administrator passwords if compromise is suspected

Patch Information

No vendor patch is referenced in the NVD entry at the time of publication. Site owners should monitor the ThemeForest Portfolio Theme listing and the Wordfence Vulnerability Report for updated fixed versions and apply them as soon as available.

Workarounds

Block requests containing directory traversal characters at the WAF or reverse proxy layer
Disable PHP execution in the WordPress uploads directory via an .htaccess or Nginx location rule
Limit file upload types to non-executable formats and validate MIME types server-side
Apply least-privilege file system permissions so the PHP process cannot read sensitive host files

bash

# Apache: disable PHP execution in the WordPress uploads directory
# Place in wp-content/uploads/.htaccess
<FilesMatch "\.(php|phtml|php3|php4|php5|php7|phar)$">
    Require all denied
</FilesMatch>