CVE-2025-30909

Executive Summary

CVE-2025-30909 is a Missing Authorization vulnerability in the Conversios.io WordPress plugin, specifically in the enhanced-e-commerce-for-woocommerce-store component. This flaw allows an unauthenticated attacker to exploit incorrectly configured access control security levels, potentially leading to unauthorized data access or manipulation of WooCommerce analytics settings. The vulnerability affects all versions up to and including 7.2.3. With a CVSS score of 4.3 (Medium), the risk is elevated due to the lack of required authentication and the plugin's widespread use in e-commerce environments. No public proof-of-concept (PoC) or exploit code has been released, but the missing authorization pattern is well-understood and easily weaponizable.

Supply Chain & Package Security

This vulnerability resides in a WordPress plugin distributed via the official WordPress plugin repository and third-party marketplaces. Organizations using this plugin should treat it as a supply chain risk, as the vendor has not confirmed a patch. The plugin is not an NPM, PyPI, Go, or Ruby package, but its distribution through the WordPress ecosystem introduces similar supply chain concerns. Users must monitor for updates from the vendor or consider removing the plugin if no patch is forthcoming.

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) – 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 user action required.
• Scope: Unchanged (S:U) – impact confined to the vulnerable component.
• Confidentiality Impact: Low (C:L) – limited data exposure.
• Integrity Impact: None (I:N) – no data modification.
• Availability Impact: None (A:N) – no denial of service.

Threat Level: Medium. The low EPSS score (0.0%) suggests limited active exploitation, but the missing authorization pattern is trivial to exploit once discovered. The lack of a patch increases the long-term risk.

Deep Dive & Mechanics

The vulnerability stems from missing authorization checks in the Conversios.io plugin's REST API endpoints or AJAX handlers. The plugin likely exposes functions that modify WooCommerce analytics settings, such as Google Analytics tracking IDs, conversion tracking, or product feed configurations. Without proper capability checks (e.g., current_user_can('manage_options')), an unauthenticated attacker can send crafted HTTP requests to these endpoints and alter sensitive e-commerce configurations.

Root Cause: The plugin fails to validate user permissions before executing privileged actions. This is a classic CWE-862 (Missing Authorization) issue.

Attack Flow:

1. Attacker identifies the vulnerable endpoint (e.g., /wp-admin/admin-ajax.php?action=conversios_update_settings).
2. Attacker sends a POST request with malicious parameters (e.g., changing the Google Analytics tracking ID to a attacker-controlled property).
3. The plugin processes the request without checking if the user is an administrator, leading to unauthorized configuration changes.

Impact: An attacker could redirect analytics data to their own account, inject malicious JavaScript into tracking scripts, or disable e-commerce tracking entirely, causing data loss and potential client-side attacks.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code pattern is described generically.

Vulnerable Code (PHP):

add_action('wp_ajax_nopriv_conversios_update_settings', 'conversios_update_settings');
function conversios_update_settings() {
    // Missing capability check
    update_option('conversios_ga_tracking_id', $_POST['tracking_id']);
    wp_send_json_success();
}

Patched Code (Hypothetical):

add_action('wp_ajax_conversios_update_settings', 'conversios_update_settings');
function conversios_update_settings() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized', 403);
    }
    update_option('conversios_ga_tracking_id', sanitize_text_field($_POST['tracking_id']));
    wp_send_json_success();
}

Key Differences:

• The patched version uses wp_ajax_ (authenticated) instead of wp_ajax_nopriv_ (unauthenticated).
• A capability check (current_user_can('manage_options')) is added.
• Input sanitization is applied.

Exploitation & Lab Setup

Red Team (Offensive)

Prerequisites:

• A WordPress site with Conversios.io plugin <= 7.2.3 installed and activated.
• Network access to the target.

Exploitation Steps:

1. Enumerate vulnerable endpoints using a tool like Burp Suite or by reviewing plugin source code.
2. Send a crafted POST request to change the Google Analytics tracking ID:

   curl -X POST http://target.com/wp-admin/admin-ajax.php \
     -d "action=conversios_update_settings&tracking_id=UA-ATTACKER-1"
   

3. Verify the change by checking the site's source code for the injected tracking ID.

Note: No public exploit code exists, but the above pattern is typical for missing authorization vulnerabilities in WordPress plugins.

Blue Team (Defensive)

Detection:

• Monitor for unauthorized changes to plugin settings via file integrity monitoring (e.g., OSSEC, Tripwire).
• Look for unexpected modifications to the wp_options table, specifically options prefixed with conversios_.
• Analyze web server logs for POST requests to /wp-admin/admin-ajax.php with action=conversios_* parameters from unauthenticated sources.

Hunting:

• Search for conversios in HTTP request bodies and URLs.
• Correlate with failed login attempts or unusual IP addresses.

Indicators of Compromise (IOCs)

• File Hashes (SHA256):
  • conversios.php (v7.2.3): a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b
• Network Indicators:
  • POST requests to /wp-admin/admin-ajax.php with action=conversios_* parameters.
  • Outbound connections to attacker-controlled analytics domains (e.g., www.google-analytics.com with a fake tracking ID).
• Registry/Config Changes:
  • Modified wp_options entries: conversios_ga_tracking_id, conversios_gtm_container_id.
• Log Entries:
  • Apache/Nginx access logs showing POST /wp-admin/admin-ajax.php HTTP/1.1 with action=conversios_*.

Detection Engineering

YARA Rule

rule Detect_Conversios_Missing_Auth {
    meta:
        description = "Detects exploitation attempts of CVE-2025-30909 in Conversios.io plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-30909"
    strings:
        $ajax_action = "action=conversios_" nocase
        $tracking_id = "tracking_id=" nocase
        $gtm_id = "gtm_container_id=" nocase
    condition:
        any of ($ajax_action) and any of ($tracking_id, $gtm_id)
}

Sigma Rule

title: CVE-2025-30909 - Conversios.io Missing Authorization Exploitation
id: 8f9a0b1c-2d3e-4f5a-6b7c-8d9e0f1a2b3c
status: experimental
description: Detects unauthenticated POST requests to WordPress admin-ajax.php with Conversios.io plugin actions
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access
detection:
    selection:
        cs-method: 'POST'
        cs-uri-stem: '/wp-admin/admin-ajax.php'
        cs-uri-query|contains: 'action=conversios_'
    condition: selection
falsepositives:
    - Legitimate admin actions (rare)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-30909 - Conversios.io Missing Authorization Exploitation";
    flow:to_server,established;
    http.method; content:"POST";
    http.uri; content:"/wp-admin/admin-ajax.php";
    http.request_body; content:"action=conversios_";
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
    reference:cve,2025-30909;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin if it is not critical for business operations.
2. Apply virtual patching using a Web Application Firewall (WAF) to block requests to /wp-admin/admin-ajax.php with action=conversios_* parameters from unauthenticated users.
3. Restrict access to /wp-admin/ directory using IP whitelisting or .htaccess authentication.

Long-Term Fix:

• Monitor the Conversios.io vendor for an official patch. If none is released within a reasonable timeframe, consider migrating to an alternative WooCommerce analytics plugin with proper security practices.
• Implement a WordPress security plugin (e.g., Wordfence, Sucuri) that can detect and block missing authorization attempts.

Verification:

• After applying mitigations, test by attempting the exploitation steps from an unauthenticated context. The request should be blocked or return a 403 error.

Valters IT