CVE-2025-32289

Executive Summary

CVE-2025-32289 is a critical vulnerability in the Yozi WordPress theme developed by ApusTheme. The flaw is a PHP Local File Inclusion (LFI) vulnerability, stemming from improper control of a filename used in an include/require statement. This allows an unauthenticated attacker to include arbitrary local files from the server, potentially exposing sensitive configuration files, source code, or credentials. The vulnerability affects all versions of Yozi up to and including 2.0.63. No patch is currently available, and no public exploit code has been released. The CVSS score of 8.1 (High) reflects the ease of exploitation and the high confidentiality impact.

Supply Chain & Package Security

This vulnerability resides in a WordPress theme, which is part of the WordPress ecosystem. The theme is distributed via the official WordPress theme repository and potentially through third-party marketplaces. Users who have installed the Yozi theme are at risk. The lack of a patch means that the supply chain is currently compromised for all users of this theme. Administrators should consider the theme as a high-risk component and either remove it or apply strict file access controls until a patch is released.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – The vulnerability can be exploited remotely.
• Attack Complexity (AC): Low (L) – No special conditions are required.
• Privileges Required (PR): None (N) – No authentication is needed.
• User Interaction (UI): None (N) – No user action is required.
• Scope (S): Unchanged (U) – The vulnerable component and the impacted component are the same.
• Confidentiality (C): High (H) – Sensitive files can be read.
• Integrity (I): None (N) – File contents cannot be modified.
• Availability (A): None (N) – No impact on availability.

CVSS Score: 8.1 (High)
Threat Level: Critical for confidentiality. The vulnerability is easy to exploit and can lead to full disclosure of server-side files.

Deep Dive & Mechanics

The vulnerability is a PHP Local File Inclusion (LFI) in the Yozi theme. The theme likely uses a parameter (e.g., page, template, or include) to dynamically load PHP files. Due to insufficient sanitization, an attacker can manipulate this parameter to include arbitrary files from the server.

How it works:

1. The theme's code contains a statement like include($_GET['file'] . '.php'); or similar.
2. The attacker sends a crafted HTTP request with a path traversal payload, e.g., ?file=../../../../etc/passwd.
3. The PHP interpreter includes the specified file, outputting its contents to the attacker.

Why it's dangerous:

• An attacker can read /etc/passwd, /etc/shadow, database configuration files (wp-config.php), or any other readable file.
• This can lead to credential theft, privilege escalation, or further attacks.

Vulnerable vs. Patched Code

Since no patch is available, we can only hypothesize the vulnerable code pattern and the expected fix.

Vulnerable Code (Hypothetical):

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

Patched Code (Expected):

<?php
$allowed_files = array('header', 'footer', 'sidebar');
$file = $_GET['template'];
if (in_array($file, $allowed_files)) {
    include( $file . '.php' );
} else {
    // Handle error
}
?>

The fix would involve whitelisting allowed files, sanitizing the input, or using a predefined mapping.

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• A WordPress site running Yozi theme version <= 2.0.63.
• The vulnerable parameter (e.g., template, page, include). This must be identified through source code review or fuzzing.

Exploitation Steps:

1. Identify the vulnerable parameter. Common candidates: ?template=, ?page=, ?include=.
2. Send a GET request with path traversal:

   GET /?template=../../../../etc/passwd HTTP/1.1
   Host: target.com
   

3. If successful, the server will return the contents of /etc/passwd.

Example using cURL:

curl -v "http://target.com/?template=../../../../etc/passwd"

Expected Output:

root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
...

Blue Team (Detection & Response)

Detection:

• Monitor web server logs for suspicious ../ patterns in GET parameters.
• Look for requests to the theme's main file (e.g., index.php) with unusual parameters.
• Use WAF rules to block path traversal attempts.

Response:

• Immediately isolate the affected server.
• Review logs for any successful exploitation.
• Change all credentials that may have been exposed (database, admin, FTP).
• Remove or disable the Yozi theme until a patch is applied.

Indicators of Compromise (IOCs)

• File Paths: /etc/passwd, /etc/shadow, /wp-config.php, /proc/self/environ
• URL Patterns: ?template=../../, ?page=../../, ?include=../../
• Log Entries: HTTP requests containing %2e%2e%2f (URL-encoded ../) or ..%2f
• Network: Outbound connections from the web server to unknown IPs (if the attacker uses the LFI to execute code via log poisoning)

Detection Engineering

YARA Rule

rule CVE_2025_32289_LFI {
    meta:
        description = "Detects LFI attempts targeting Yozi theme"
        author = "Valters IT"
        date = "2025-04-01"
        reference = "CVE-2025-32289"
    strings:
        $path_traversal = /(\.\.\/|\.\.\\){2,}/
        $sensitive_file = /(etc\/passwd|etc\/shadow|wp-config\.php|proc\/self\/environ)/
    condition:
        $path_traversal and $sensitive_file
}

Sigma Rule

title: CVE-2025-32289 Yozi Theme LFI Detection
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects path traversal attempts targeting the Yozi WordPress theme
author: Valters IT
date: 2025-04-01
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains:
            - '..%2f'
            - '%2e%2e%2f'
            - '..\\'
            - '../../'
    condition: selection
falsepositives:
    - Legitimate use of path traversal in other applications (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-32289 Yozi Theme LFI Attempt"; flow:to_server,established; content:"GET"; http_method; content:"..%2f"; http_uri; nocase; content:"..\\"; http_uri; nocase; content:"../../"; http_uri; nocase; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the Yozi theme and switch to a default WordPress theme (e.g., Twenty Twenty-Four).
2. Apply a Web Application Firewall (WAF) rule to block path traversal patterns.
3. Review server logs for any signs of exploitation.

Long-term Fix:

• Monitor the ApusTheme website for a security patch.
• Once a patch is released, update the theme immediately.
• Consider replacing the Yozi theme with a more secure alternative.

Valters IT Signature
This report was generated by Valters IT Cyber Threat Intelligence Division. For questions, contact cti@valters-it.com.