CVE-2025-63070

Executive Summary

CVE-2025-63070 is a medium-severity information disclosure vulnerability affecting the WordPress plugin Download Manager by Shahjada, up to and including version 3.3.32. The vulnerability allows an unauthenticated attacker to retrieve embedded sensitive data from the plugin's internal storage or configuration, leading to exposure of system information to an unauthorized control sphere. This is classified as an Exposure of Sensitive System Information to an Unauthorized Control Sphere (CWE-200). The CVSS score is 4.3 (Medium), with a low attack complexity and no privileges required. No public proof-of-concept or exploit code has been identified at this time, and the patch status remains unknown.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users are advised to monitor the plugin's page for updates and apply patches as soon as they become available. Since the plugin is part of the WordPress ecosystem, supply chain risks include potential compromise of the plugin update mechanism or inclusion of malicious code in future updates.

CVSS Breakdown & Threat Level

• CVSS Score: 4.3 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: Low
• Integrity Impact: None
• Availability Impact: None

The threat level is considered medium due to the low confidentiality impact and the lack of integrity or availability impact. However, the exposed sensitive information could be leveraged in further attacks, such as privilege escalation or lateral movement.

Deep Dive & Mechanics

The vulnerability resides in the Download Manager plugin's handling of internal data retrieval. The plugin exposes sensitive system information (e.g., file paths, database credentials, or API keys) through an unauthorized control sphere, likely via a REST API endpoint or a direct file read mechanism. An attacker can send a crafted HTTP request to a specific URL without authentication, causing the plugin to return embedded sensitive data.

The root cause is insufficient access control checks on internal functions that output system information. The plugin fails to validate whether the requesting user has the necessary permissions to view such data, leading to information disclosure.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code is presumed to be in the plugin's core files. A typical vulnerable pattern might look like:

// Vulnerable code (example)
function get_system_info() {
    // No permission check
    $info = get_option('download_manager_config');
    echo json_encode($info);
}
add_action('rest_api_init', function () {
    register_rest_route('download-manager/v1', '/system-info', array(
        'methods' => 'GET',
        'callback' => 'get_system_info',
    ));
});

A patched version would include a permission check:

// Patched code (example)
function get_system_info() {
    if (!current_user_can('manage_options')) {
        return new WP_Error('rest_forbidden', 'You do not have permission.', array('status' => 403));
    }
    $info = get_option('download_manager_config');
    return rest_ensure_response($info);
}

Exploitation & Lab Setup

Red Team

1. Reconnaissance: Identify WordPress sites running Download Manager plugin version <= 3.3.32 using Shodan dorks or WPScan.
2. Exploitation: Send a GET request to the vulnerable endpoint (e.g., /wp-json/download-manager/v1/system-info).
3. Data Extraction: Parse the response for sensitive data such as database credentials, file paths, or API keys.

Example curl command:

curl -X GET http://target.com/wp-json/download-manager/v1/system-info

Blue Team

1. Detection: Monitor for unusual requests to /wp-json/download-manager/v1/system-info or similar endpoints.
2. Honeypot: Deploy a fake endpoint that logs attacker IPs and alerts.
3. Mitigation: Implement a Web Application Firewall (WAF) rule to block requests to unknown REST API endpoints.

Indicators of Compromise (IOCs)

• Network: HTTP requests to /wp-json/download-manager/v1/system-info or similar paths.
• Logs: Unauthorized access attempts to REST API endpoints without authentication.
• File: Presence of unexpected configuration files in the plugin directory.

Detection Engineering

YARA Rule

rule CVE_2025_63070_WordPress_Download_Manager {
    meta:
        description = "Detects exploitation attempts for CVE-2025-63070 in WordPress Download Manager plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2025-63070"
    strings:
        $s1 = "/wp-json/download-manager/v1/system-info" ascii wide nocase
        $s2 = "download-manager/v1/system-info" ascii wide nocase
    condition:
        any of them
}

Sigma Rule

title: CVE-2025-63070 - WordPress Download Manager Information Disclosure
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects HTTP requests to the vulnerable endpoint of Download Manager plugin
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'GET'
        cs-uri-stem|contains: '/wp-json/download-manager/v1/system-info'
    condition: selection
falsepositives:
    - Legitimate admin requests (if endpoint is protected)
level: medium

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-63070 - WordPress Download Manager Information Disclosure"; flow:to_server; content:"/wp-json/download-manager/v1/system-info"; http_uri; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate: Disable the Download Manager plugin until a patch is available.
2. Short-term: Implement a WAF rule to block requests to /wp-json/download-manager/v1/system-info.
3. Long-term: Monitor the plugin's official page for updates and apply patches as soon as they are released.
4. Alternative: Consider switching to a different, actively maintained download manager plugin.

Valters IT
Securing Digital Frontiers