CVE-2025-62755

Executive Summary

CVE-2025-62755 is a Missing Authorization vulnerability in the GS Portfolio for Envato WordPress plugin (versions <= 1.4.2). This flaw allows an unauthenticated attacker to exploit incorrectly configured access control security levels, potentially leading to unauthorized data exposure or manipulation. The vulnerability is classified under CWE-862 (Missing Authorization) and has a CVSS score of 5.3 (Medium). As of this report, no official patch is available, and no public proof-of-concept (PoC) or exploit code has been released. The EPSS score is 0.0%, indicating a low probability of exploitation in the wild at this time.

Supply Chain & Package Security

This vulnerability affects the GS Portfolio for Envato WordPress plugin, which is distributed via the WordPress plugin repository and third-party marketplaces. Users are advised to monitor for updates from the vendor and consider disabling the plugin until a patch is released.

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: 5.3 (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.

Deep Dive & Mechanics

The vulnerability resides in the GS Portfolio for Envato plugin, which is designed to display Envato portfolio items on WordPress sites. The plugin fails to properly enforce authorization checks on certain AJAX actions or REST API endpoints, allowing unauthenticated users to access or modify data that should be restricted.

Root Cause: The plugin uses wp_ajax_* hooks without verifying user capabilities (e.g., current_user_can()). This allows any user, including unauthenticated visitors, to trigger sensitive functions.

Attack Vector: An attacker can send crafted HTTP requests to the vulnerable endpoints, bypassing access controls. For example, a request to wp-admin/admin-ajax.php with the appropriate action parameter could retrieve private portfolio data or modify plugin settings.

Impact: Unauthorized disclosure of portfolio items, user data, or configuration details. In some cases, the attacker might be able to modify or delete portfolio entries.

Vulnerable vs. Patched Code

Since no patch is available, the following is a hypothetical comparison based on common fixes for missing authorization vulnerabilities.

Vulnerable Code (example):

add_action('wp_ajax_nopriv_get_portfolio_data', 'get_portfolio_data');
function get_portfolio_data() {
    // No capability check
    $portfolio_id = $_POST['portfolio_id'];
    $data = get_post_meta($portfolio_id, 'portfolio_data', true);
    wp_send_json_success($data);
}

Patched Code (example):

add_action('wp_ajax_nopriv_get_portfolio_data', 'get_portfolio_data');
function get_portfolio_data() {
    // Add capability check
    if (!current_user_can('edit_posts')) {
        wp_send_json_error('Unauthorized');
        return;
    }
    $portfolio_id = $_POST['portfolio_id'];
    $data = get_post_meta($portfolio_id, 'portfolio_data', true);
    wp_send_json_success($data);
}

Exploitation & Lab Setup

Red Team

Prerequisites:

• A WordPress site with GS Portfolio for Envato plugin version <= 1.4.2 installed and activated.
• Network access to the target site.

Exploitation Steps:

1. Identify vulnerable endpoints by analyzing the plugin's source code or using fuzzing tools.
2. Send a crafted POST request to wp-admin/admin-ajax.php with the action parameter set to a vulnerable function (e.g., get_portfolio_data).
3. Observe the response for unauthorized data disclosure.

Example Request:

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

action=get_portfolio_data&portfolio_id=1

Expected Response:

{"success":true,"data":{"title":"Sample Portfolio","description":"Confidential data"}}

Blue Team

Detection:

• Monitor for unusual AJAX requests to admin-ajax.php with unknown or suspicious action parameters.
• Look for requests from unauthenticated users to endpoints that should require authentication.

Hunting:

• Search web server logs for patterns like POST /wp-admin/admin-ajax.php with action=get_portfolio_data or similar.
• Use the provided Sigma rule to detect exploitation attempts.

Indicators of Compromise (IOCs)

• Network:

  • HTTP POST requests to /wp-admin/admin-ajax.php with action parameters related to GS Portfolio (e.g., get_portfolio_data, update_portfolio).
  • Unusual data exfiltration patterns in response bodies.

• File:

  • Modified plugin files in /wp-content/plugins/gs-envato-portfolio/.
  • Unexpected entries in WordPress options or post meta tables.

• Log:

  • Web server logs showing repeated AJAX requests from the same IP.
  • WordPress debug logs indicating unauthorized access attempts.

Detection Engineering

YARA Rule

rule CVE_2025_62755_GS_Portfolio_Exploit {
    meta:
        description = "Detects exploitation attempts of CVE-2025-62755 in GS Portfolio for Envato"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2025-62755"
    strings:
        $ajax_action = "action=get_portfolio_data" nocase
        $ajax_action2 = "action=update_portfolio" nocase
        $plugin_path = "/wp-content/plugins/gs-envato-portfolio/" nocase
    condition:
        any of ($ajax_action*) and $plugin_path
}

Sigma Rule

title: CVE-2025-62755 - GS Portfolio for Envato Missing Authorization
id: 8a4b3c2d-1e5f-4a7b-9c8d-0e1f2a3b4c5d
status: experimental
description: Detects exploitation attempts of missing authorization vulnerability in GS Portfolio for Envato plugin
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains|all:
            - 'action=get_portfolio_data'
            - 'portfolio_id='
    condition: selection
falsepositives:
    - Legitimate admin actions (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-62755 - GS Portfolio for Envato Missing Authorization Exploit"; flow:to_server,established; content:"POST"; http_method; content:"/wp-admin/admin-ajax.php"; http_uri; content:"action=get_portfolio_data"; http_client_body; content:"portfolio_id="; http_client_body; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released.
2. Implement a Web Application Firewall (WAF) rule to block requests to admin-ajax.php with suspicious action parameters.
3. Restrict access to wp-admin/admin-ajax.php using IP whitelisting or .htaccess rules.

Long-term Fix:

• Apply the vendor's patch once available.
• Conduct a code review to ensure all AJAX actions include proper capability checks.
• Update the plugin to the latest version.

Workaround:

• Add the following to .htaccess to block unauthenticated AJAX requests:

<Files "admin-ajax.php">
    Require all denied
    Require ip 127.0.0.1
</Files>

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