CVE-2025-49276

Executive Summary

CVE-2025-49276 is a critical PHP Local File Inclusion (LFI) vulnerability discovered in the Blogmine WordPress plugin, developed by Unfoldwp. 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, such as reading the wp-config.php file containing database credentials, or potentially achieving remote code execution if combined with file upload capabilities. The vulnerability affects all versions of Blogmine up to and including 1.1.7. No patch is currently available, and no public proof-of-concept (PoC) exploit has been released. The EPSS score is 0.0%, indicating low exploitation activity in the wild, but the risk remains high due to the potential impact.

Supply Chain & Package Security

This vulnerability is specific to the WordPress ecosystem and the Blogmine plugin. As a WordPress plugin, it is distributed through the official WordPress plugin repository and third-party marketplaces. Users are advised to monitor the plugin's page for updates and consider removing the plugin if no patch is forthcoming. The lack of a patch and the nature of the vulnerability (LFI) make it a high-priority supply chain risk for any WordPress site using this plugin.

CVSS Breakdown & Threat Level

• CVSS Score: 8.1 (High)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
• Attack Vector (AV): Network – The vulnerability can be exploited remotely.
• Attack Complexity (AC): Low – No special conditions are required.
• Privileges Required (PR): None – No authentication needed.
• User Interaction (UI): None – No user action required.
• Scope (S): Unchanged – The vulnerable component and the impacted component are the same.
• Confidentiality (C): High – Sensitive files (e.g., wp-config.php) can be read.
• Integrity (I): None – No file modification is possible directly.
• Availability (A): None – No denial of service.

Threat Level: High. The vulnerability is easy to exploit, requires no authentication, and can lead to full disclosure of sensitive server data.

Deep Dive & Mechanics

The vulnerability exists in the Blogmine plugin's PHP code, where a user-supplied parameter (likely a page, template, or file parameter) is used directly in a PHP include() or require() statement without proper sanitization or validation. This is a classic Local File Inclusion (LFI) flaw.

How it works:

1. An attacker sends a crafted HTTP request to a vulnerable endpoint of the Blogmine plugin.
2. The request includes a parameter that specifies a file path, such as ?page=../../../../etc/passwd.
3. The plugin's code uses this parameter in an include() statement, e.g., include($_GET['page'] . '.php');.
4. The attacker can use path traversal sequences (../) to navigate the filesystem and include arbitrary files.
5. The content of the included file is then rendered in the HTTP response, allowing the attacker to read sensitive files.

Example vulnerable code snippet (hypothetical):

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

Impact:

• Information Disclosure: Read /etc/passwd, wp-config.php, or any readable file.
• Potential RCE: If the attacker can upload a file (e.g., via another plugin or feature), they can include it and execute arbitrary PHP code.

Vulnerable vs. Patched Code

Since no patch is available, we can only describe the vulnerable pattern and what a secure version should look like.

Vulnerable Code (Hypothetical):

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

Patched Code (Recommended):

<?php
// blogmine.php
$allowed_pages = array('home', 'about', 'contact');
$page = $_GET['page'];
if (in_array($page, $allowed_pages)) {
    include( $page . '.php' );
} else {
    // Handle error
    echo 'Invalid page.';
}
?>

The patched version uses a whitelist of allowed values, preventing any path traversal or arbitrary file inclusion.

Exploitation & Lab Setup

Red Team (Attacker)

Prerequisites:

• A WordPress site with Blogmine plugin version <= 1.1.7 installed.
• Knowledge of the vulnerable endpoint (e.g., /?page=).

Exploitation Steps:

1. Identify the vulnerable parameter by fuzzing the plugin's URLs.
2. Send a request to read /etc/passwd:

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

3. If successful, the response will contain the contents of /etc/passwd.
4. To read wp-config.php:

   GET /?page=../../../../wp-config HTTP/1.1
   

   (Note: The .php extension is appended automatically.)

Lab Setup:

• Use a local WordPress installation with Docker:

  docker run --name wp-blogmine -e WORDPRESS_DB_HOST=db -e WORDPRESS_DB_USER=wordpress -e WORDPRESS_DB_PASSWORD=wordpress -e WORDPRESS_DB_NAME=wordpress -p 8080:80 -d wordpress
  

• Install the Blogmine plugin manually by downloading version 1.1.7 from a mirror.
• Activate the plugin and test the vulnerability.

Blue Team (Defender)

Detection:

• Monitor web server logs for suspicious page parameters containing ../ or absolute paths.
• Look for requests to wp-content/plugins/blogmine/ with unusual query strings.
• Use the Sigma rule provided in the Detection Engineering section.

Mitigation:

• Immediately disable or remove the Blogmine plugin if no patch is available.
• Implement a Web Application Firewall (WAF) rule to block path traversal patterns.
• Restrict file inclusion via PHP configuration (e.g., allow_url_include = Off).

Indicators of Compromise (IOCs)

• File Paths: /etc/passwd, /etc/shadow, /wp-config.php, /proc/self/environ
• URL Patterns: /?page=../../../../etc/passwd, /?page=../../../../wp-config
• Log Entries: HTTP requests with page parameter containing ../ or %2e%2e%2f
• Plugin Version: Blogmine <= 1.1.7

Detection Engineering

YARA Rule

rule CVE_2025_49276_Blogmine_LFI {
    meta:
        description = "Detects attempts to exploit CVE-2025-49276 in Blogmine plugin"
        author = "Valters IT"
        date = "2025-04-01"
        reference = "CVE-2025-49276"
    strings:
        $path_traversal = /page=([\.\.\/]|%2e%2e%2f)+/
        $sensitive_file = /(etc\/passwd|wp-config|proc\/self)/
    condition:
        $path_traversal and $sensitive_file
}

Sigma Rule

title: CVE-2025-49276 Blogmine LFI Attempt
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects HTTP requests attempting to exploit LFI in Blogmine plugin
author: Valters IT
date: 2025-04-01
logsource:
    category: webserver
    product: apache
detection:
    selection:
        c-uri|contains:
            - 'page=../'
            - 'page=%2e%2e%2f'
            - 'page=../../'
    condition: selection
falsepositives:
    - Legitimate use of path traversal in other contexts (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-49276 Blogmine LFI Attempt"; flow:to_server,established; content:"page="; http_uri; pcre:"/page=(\.\.\/|%2e%2e%2f)+/"; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate Action: Disable and remove the Blogmine plugin from all WordPress installations until a patch is released.
2. WAF Rules: Deploy a Web Application Firewall rule to block requests containing page=../ or similar path traversal patterns.
3. PHP Configuration: Ensure allow_url_include is set to Off and open_basedir is properly configured.
4. Monitoring: Enable logging and monitor for suspicious page parameter usage.
5. Vendor Contact: Reach out to Unfoldwp for an official patch or consider forking the plugin to fix the vulnerability.
6. Alternative Plugins: If Blogmine is critical, consider migrating to a similar, actively maintained plugin.

Valters IT
Securing Digital Frontiers