CVE-2026-25397: WooCommerce File Uploader Path Traversal

CVE-2026-25397 Overview

A path traversal vulnerability has been identified in Snowray Software File Uploader for WooCommerce, a WordPress plugin that enables file upload functionality for WooCommerce stores. The vulnerability exists due to improper sanitization of file path inputs, allowing attackers to use specially crafted path sequences (.../...//') to escape intended directory restrictions and access or manipulate files outside the designated upload directory.

Critical Impact

Successful exploitation of this path traversal vulnerability could allow attackers to read sensitive configuration files, access customer data, or potentially overwrite critical system files on affected WordPress installations.

Affected Products

• Snowray Software File Uploader for WooCommerce versions through 1.0.4
• WordPress sites running vulnerable versions of the plugin
• WooCommerce stores with file upload functionality enabled

Discovery Timeline

• 2026-03-25 - CVE-2026-25397 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2026-25397

Vulnerability Analysis

This vulnerability is classified as CWE-35 (Path Traversal: '.../...//'). The File Uploader for WooCommerce plugin fails to properly validate and sanitize user-supplied file paths during file upload operations. The plugin's path handling mechanism does not adequately filter directory traversal sequences, allowing attackers to construct malicious path strings that break out of the intended upload directory.

The network-based attack vector requires user interaction, indicating the vulnerability may be exploited through social engineering or by enticing a legitimate user to interact with a malicious request. The impact spans confidentiality, integrity, and availability of the affected system, as attackers could potentially read sensitive files, modify existing content, or disrupt service by manipulating critical files.

Root Cause

The root cause of this vulnerability lies in insufficient input validation within the file path handling logic of the plugin. The application fails to properly canonicalize file paths before processing them, allowing specially crafted traversal sequences like .../...//' to bypass directory restrictions. This is a classic path traversal weakness where user input is directly incorporated into file system operations without adequate sanitization or validation against directory escape attempts.

Attack Vector

The attack is conducted over the network and requires some form of user interaction to be exploited. An attacker would craft a malicious request containing path traversal sequences within file path parameters. When processed by the vulnerable plugin, these sequences allow the attacker to navigate outside the intended upload directory structure.

The traversal pattern .../...//' is a variant designed to evade basic sanitization filters that may only check for standard ../ sequences. By using alternative representations, the attacker can bypass insufficient input validation controls and access arbitrary locations on the file system within the web server's permissions context.

Detection Methods for CVE-2026-25397

Indicators of Compromise

• Unusual file access patterns in web server logs showing path traversal sequences such as .../...//' or encoded variants
• Unexpected file modifications outside the standard WordPress upload directories
• Access log entries showing requests to the file uploader endpoint with suspicious path parameters
• Presence of unfamiliar files in sensitive WordPress directories like wp-config.php parent folder

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block path traversal patterns including ../, ..\/, and encoded variants
• Monitor file upload endpoints for requests containing directory traversal sequences in file path parameters
• Enable verbose logging on the WordPress installation to capture detailed request information for forensic analysis
• Deploy file integrity monitoring (FIM) solutions to detect unauthorized file access or modifications

Monitoring Recommendations

• Configure alerts for any file access attempts outside designated upload directories
• Review web server access logs regularly for suspicious path patterns targeting the file uploader plugin
• Implement centralized log aggregation to correlate file access events across multiple WordPress installations
• Monitor for WordPress plugin enumeration attempts that may precede exploitation attempts

How to Mitigate CVE-2026-25397

Immediate Actions Required

• Deactivate the File Uploader for WooCommerce plugin until a patched version is available
• Review file system logs for evidence of exploitation attempts
• Audit file permissions to ensure the web server user has minimal necessary access
• Implement WAF rules to block path traversal patterns at the network perimeter

Patch Information

As of the last update on 2026-03-26, all versions of File Uploader for WooCommerce through version 1.0.4 are affected. Organizations should monitor the Patchstack WordPress Vulnerability Report for updates regarding a security patch from Snowray Software. Until an official patch is released, the plugin should be disabled on production systems.

Workarounds

• Disable the File Uploader for WooCommerce plugin on production WordPress installations until a patch is available
• Implement server-level restrictions using .htaccess or web server configuration to block requests containing path traversal sequences
• Use a web application firewall (WAF) to filter malicious requests before they reach the application
• Consider alternative file upload plugins with a stronger security track record

# Apache .htaccess rule to block common path traversal patterns
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./) [NC,OR]
RewriteCond %{QUERY_STRING} (\.\.\\) [NC,OR]
RewriteCond %{REQUEST_URI} (\.\./) [NC,OR]
RewriteCond %{REQUEST_URI} (\.\.\\) [NC]
RewriteRule .* - [F,L]