CVE-2025-47512: Tainacan Path Traversal Vulnerability

CVE-2025-47512 Overview

CVE-2025-47512 is a Path Traversal vulnerability (CWE-22) affecting the Tainacan WordPress plugin. This improper limitation of a pathname to a restricted directory allows attackers to traverse the file system and potentially delete arbitrary files on the affected WordPress installation. The vulnerability can be exploited remotely without authentication, making it a significant threat to WordPress sites running vulnerable versions of the plugin.

Critical Impact

Unauthenticated attackers can exploit this path traversal flaw to delete arbitrary files on the server, potentially leading to complete denial of service by removing critical application files.

Affected Products

• Tainacan WordPress Plugin versions through 0.21.14
• WordPress installations with Tainacan plugin enabled
• Web servers hosting affected WordPress configurations

Discovery Timeline

• 2025-05-23 - CVE-2025-47512 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-47512

Vulnerability Analysis

This path traversal vulnerability exists due to improper validation of user-supplied file paths within the Tainacan plugin. The vulnerability allows attackers to use directory traversal sequences (such as ../) to escape the intended directory structure and access files outside the web application's root directory. When exploited, this flaw enables arbitrary file deletion, which can severely impact system availability by removing critical WordPress files, configuration files, or even system-level files depending on server permissions.

The attack can be executed over the network without requiring any authentication or user interaction. The scope is changed, meaning the vulnerable component impacts resources beyond its own security scope, specifically affecting the underlying file system integrity and potentially the entire WordPress installation.

Root Cause

The root cause of CVE-2025-47512 is insufficient input validation in the Tainacan plugin's file handling functionality. The application fails to properly sanitize or validate file path parameters before performing file operations. This allows malicious path traversal sequences to be processed, enabling attackers to reference and manipulate files outside the intended directory boundaries. Proper input validation, path canonicalization, and restriction to a safe directory would prevent this vulnerability.

Attack Vector

The attack vector is network-based, requiring no privileges or user interaction. An attacker can craft malicious HTTP requests containing path traversal sequences targeting the vulnerable file deletion functionality in the Tainacan plugin.

The exploitation follows this pattern:

1. The attacker identifies a WordPress site running a vulnerable version of Tainacan (≤ 0.21.14)
2. The attacker crafts a request containing path traversal sequences (e.g., ../../) in the file path parameter
3. The plugin processes the malicious path without adequate validation
4. The targeted file is deleted from the server file system
5. Repeated exploitation can remove critical files, causing denial of service

For detailed technical analysis and proof of concept information, refer to the Patchstack Vulnerability Report.

Detection Methods for CVE-2025-47512

Indicators of Compromise

• Unexpected HTTP requests to Tainacan plugin endpoints containing ../ or URL-encoded traversal sequences (%2e%2e%2f)
• Missing critical WordPress files such as wp-config.php, .htaccess, or core plugin files
• Error logs indicating file not found for files that should exist
• Access logs showing unusual patterns of requests targeting Tainacan plugin endpoints

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block path traversal patterns in HTTP requests
• Monitor file integrity using tools that alert on unexpected file deletions or modifications
• Review web server access logs for requests containing directory traversal sequences targeting the Tainacan plugin
• Deploy intrusion detection systems (IDS) with signatures for path traversal attack patterns

Monitoring Recommendations

• Enable detailed logging for all file operations within the WordPress installation
• Set up file integrity monitoring (FIM) alerts for critical WordPress files and directories
• Monitor Tainacan plugin endpoints for anomalous request patterns or high request volumes
• Configure alerts for any HTTP 404 errors related to core WordPress files that should not be missing

How to Mitigate CVE-2025-47512

Immediate Actions Required

• Audit your WordPress installation to confirm if Tainacan plugin version 0.21.14 or earlier is installed
• Check for any signs of exploitation by reviewing access logs for path traversal patterns
• Implement WAF rules to block path traversal sequences in requests to the Tainacan plugin
• Consider temporarily disabling the Tainacan plugin until a patched version is applied

Patch Information

Review the Patchstack Vulnerability Report for the latest information on available patches and updated versions. Update the Tainacan plugin to a version newer than 0.21.14 when a security fix becomes available. Always keep WordPress core, themes, and plugins updated to their latest secure versions.

Workarounds

• Deploy a Web Application Firewall (WAF) with rules to block path traversal sequences in all incoming requests
• Restrict file system permissions to limit the web server's ability to delete files outside the uploads directory
• Implement server-level controls to prevent PHP from executing file deletion operations on sensitive directories
• Use WordPress security plugins that provide real-time protection against common attack vectors including path traversal

# Example .htaccess rule to block path traversal attempts
# Add to WordPress root .htaccess file
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./|\.\.\\) [NC,OR]
RewriteCond %{REQUEST_URI} (\.\./|\.\.\\) [NC]
RewriteRule .* - [F,L]