CVE-2025-49041

Executive Summary

CVE-2025-49041 is a Missing Authorization vulnerability (CWE-862) in the Get Cash WordPress plugin, developed by The African Boss. The flaw affects all versions up to and including 3.2.3. An unauthenticated attacker can exploit incorrectly configured access control security levels to perform unauthorized actions, such as modifying plugin settings, accessing sensitive data, or triggering unintended functionality. The vulnerability has a CVSS score of 6.5 (Medium), with a network attack vector and low complexity. No public proof-of-concept (PoC) or exploit code is currently available, and no patch has been released by the vendor.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users who installed the plugin from the repository are at risk. Since the plugin is not hosted on NPM, PyPI, Go, or Ruby, no package manager-specific supply chain risks apply. However, the lack of a patch increases the risk of supply chain compromise if the plugin is bundled in themes or other distributions.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
• Base Score: 6.5 (Medium)
• Attack Vector: Network (AV:N) – Exploitable remotely.
• Attack Complexity: Low (AC:L) – No special conditions required.
• Privileges Required: None (PR:N) – No authentication needed.
• User Interaction: None (UI:N) – No victim action required.
• Scope: Unchanged (S:U) – Impact confined to the vulnerable component.
• Confidentiality Impact: Low (C:L) – Limited data exposure.
• Integrity Impact: Low (I:L) – Limited data modification.
• Availability Impact: Low (A:L) – Limited service disruption.

Threat Level: Medium. The vulnerability is easy to exploit remotely without authentication, but the impact is limited to low-level confidentiality, integrity, and availability loss. The absence of a public PoC reduces immediate risk, but the lack of a patch makes it a persistent threat.

Deep Dive & Mechanics

The vulnerability stems from missing authorization checks in the get-cash plugin's REST API endpoints or AJAX handlers. The plugin likely exposes functions that modify plugin settings, trigger cash-out operations, or access user data without verifying the user's capabilities (e.g., wp_verify_nonce or current_user_can checks). An attacker can craft HTTP requests to these endpoints to:

• Change plugin configuration (e.g., payment thresholds, API keys).
• Trigger cash-out requests on behalf of other users.
• Access sensitive logs or user data.

The flaw is classified under CWE-862: Missing Authorization, meaning the software does not perform any authorization check before allowing access to a function or resource. This is common in WordPress plugins that rely on client-side checks or omit server-side validation.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code is presumed to be present in all versions <= 3.2.3. A typical vulnerable pattern in WordPress plugins is:

// Vulnerable: No capability check
add_action('wp_ajax_nopriv_get_cash_action', 'handle_get_cash_action');
function handle_get_cash_action() {
    // Process request without checking user permissions
    update_option('get_cash_settings', $_POST['settings']);
    wp_die();
}

A patched version would include:

// Patched: Check user capability
add_action('wp_ajax_get_cash_action', 'handle_get_cash_action');
function handle_get_cash_action() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized', 403);
    }
    check_admin_referer('get_cash_nonce');
    update_option('get_cash_settings', $_POST['settings']);
    wp_die();
}

The key differences are:

• Use of wp_ajax_ (authenticated) instead of wp_ajax_nopriv_ (unauthenticated).
• Addition of current_user_can('manage_options') check.
• Inclusion of nonce verification via check_admin_referer().

Exploitation & Lab Setup

Red Team (Exploitation)

Lab Setup:

1. Install WordPress (latest version) on a local server (e.g., XAMPP, Docker).
2. Install the Get Cash plugin version 3.2.3 from the WordPress repository or a local copy.
3. Ensure the plugin is activated.

Exploitation Steps:

1. Identify the vulnerable endpoint by reviewing the plugin source code (e.g., wp-content/plugins/get-cash/includes/ajax.php).
2. Craft a POST request to the endpoint without authentication:

curl -X POST http://target/wp-admin/admin-ajax.php \
  -d 'action=get_cash_action&settings[payment_threshold]=1000'

3. If the endpoint modifies settings, verify the change by accessing the plugin's settings page or database.

Note: No public exploit code is available. The above is a generic example based on common patterns.

Blue Team (Detection & Response)

Detection Steps:

1. Monitor for unusual POST requests to /wp-admin/admin-ajax.php with action parameters containing get_cash.
2. Look for requests from IPs not associated with legitimate administrators.
3. Check for unauthorized changes to the wp_options table where option_name contains get_cash.

Response:

1. Immediately deactivate the Get Cash plugin.
2. Review server logs for suspicious requests.
3. Restore plugin settings from backup if tampered.
4. Apply virtual patching via WAF rules (see Detection Engineering).

Indicators of Compromise (IOCs)

• Network IOCs:
  • POST requests to /wp-admin/admin-ajax.php with action=get_cash_* parameters.
  • Repeated requests from the same IP to plugin endpoints without a valid nonce.
• File IOCs:
  • Modified wp_options entries with option_name like get_cash_settings.
  • Unauthorized changes to plugin files (e.g., get-cash.php).
• Behavioral IOCs:
  • Unexpected cash-out requests or payment threshold changes.
  • Plugin settings reverting to default values.

Detection Engineering

YARA Rule

rule Detect_GetCash_Missing_Auth {
    meta:
        description = "Detects exploitation attempts of CVE-2025-49041 in Get Cash plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-49041"
    strings:
        $ajax_action = "action=get_cash_" ascii wide nocase
        $admin_ajax = "/wp-admin/admin-ajax.php" ascii wide nocase
    condition:
        $ajax_action and $admin_ajax
}

Sigma Rule

title: CVE-2025-49041 - Get Cash Missing Authorization Exploitation
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects unauthorized POST requests to Get Cash plugin AJAX endpoints
author: Valters IT
date: 2025/04/10
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-49041
logsource:
    category: webserver
    product: apache
    service: access
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: '/wp-admin/admin-ajax.php'
        cs-uri-query|contains: 'action=get_cash_'
    condition: selection
falsepositives:
    - Legitimate admin actions (rare)
level: high

Suricata Rule

alert http any any -> any any (
    msg:"CVE-2025-49041 - Get Cash Missing Authorization Exploitation";
    flow:to_server,established;
    content:"POST";
    http_method;
    content:"/wp-admin/admin-ajax.php";
    http_uri;
    content:"action=get_cash_";
    http_client_body;
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
    reference:cve,2025-49041;
)

Remediation & Mitigation

Immediate Actions:

1. Deactivate the plugin until a patch is released.
2. Implement virtual patching using WAF rules to block requests to /wp-admin/admin-ajax.php with action=get_cash_* parameters from unauthenticated users.
3. Monitor logs for exploitation attempts.

Long-term Fix:

• The vendor must release a patched version (e.g., 3.2.4) that adds proper authorization checks (e.g., current_user_can('manage_options') and nonce verification).
• Users should update to the patched version once available.

Workaround:

• If the plugin is critical, restrict access to /wp-admin/admin-ajax.php via .htaccess or server configuration to only allow authenticated requests.

Valters IT