CVE-2025-67990

Executive Summary

CVE-2025-67990 is a reflected Cross-Site Scripting (XSS) vulnerability in the WordPress plugin "GMap Targeting" by Realmag777, affecting versions up to and including 1.1.7. The vulnerability arises from improper neutralization of user-supplied input during web page generation, allowing an attacker to inject arbitrary JavaScript into a reflected response. This can lead to session hijacking, credential theft, or defacement within the context of the victim's browser session. The CVSS score of 7.1 (High) reflects the low complexity of exploitation and the potential for significant impact on confidentiality, integrity, and availability. No public proof-of-concept (PoC) or exploit code has been identified at this time, and the vendor has not released a patch.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users are advised to monitor for updates from the vendor or consider removing the plugin if it is not critical to operations. No known supply chain compromise has been reported.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
• Base Score: 7.1 (High)
• 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: Required (UI:R) – Victim must click a crafted link.
• Scope: Changed (S:C) – Impact may extend beyond the vulnerable component.
• Confidentiality Impact: Low (C:L) – Limited data exposure.
• Integrity Impact: Low (I:L) – Limited modification possible.
• Availability Impact: Low (A:L) – Minor disruption possible.

Threat Level: High. The vulnerability is easy to exploit via social engineering, and the plugin is widely used in WordPress environments.

Deep Dive & Mechanics

The vulnerability exists in the gmap-targeting WordPress plugin, specifically in the handling of user input that is reflected back to the browser without proper sanitization or output encoding. The plugin likely processes parameters such as search, q, or other query string values and echoes them directly into the HTML response. An attacker can craft a malicious URL containing JavaScript payloads (e.g., <script>alert('XSS')</script>) that, when visited by an authenticated administrator or regular user, executes in the context of the WordPress admin dashboard or frontend.

The root cause is the use of functions like echo $_GET['param'] or print_r($_REQUEST) without applying WordPress's built-in escaping functions such as esc_html(), esc_attr(), or wp_kses_post(). This allows arbitrary HTML/JavaScript injection.

Vulnerable vs. Patched Code

Vulnerable Code (Example):

<?php
// In a template or shortcode handler
$search = $_GET['search'];
echo "<div class='gmap-result'>You searched for: " . $search . "</div>";
?>

Patched Code (Hypothetical):

<?php
$search = isset($_GET['search']) ? sanitize_text_field($_GET['search']) : '';
echo "<div class='gmap-result'>You searched for: " . esc_html($search) . "</div>";
?>

The patched version uses sanitize_text_field() to strip dangerous characters and esc_html() to encode output, preventing script injection.

Exploitation & Lab Setup

Red Team (Attack Simulation)

1. Setup: Deploy a WordPress instance with GMap Targeting plugin version 1.1.7.
2. Craft Payload: Create a URL with a reflected XSS payload:

   http://target-site.com/?gmap_targeting_search=<script>alert(document.cookie)</script>
   

3. Deliver: Send the link to a victim via phishing email or social media.
4. Execute: When the victim clicks the link, the script executes, stealing cookies or performing actions on their behalf.

Note: No public exploit code is available; the above is a generic example.

Blue Team (Defense & Detection)

1. Web Application Firewall (WAF): Deploy rules to block common XSS patterns in query strings.
2. Input Validation: Ensure all user inputs are sanitized and output encoded.
3. Content Security Policy (CSP): Implement a strict CSP to block inline scripts.
4. Monitor Logs: Look for unusual query strings containing <script>, onerror, or javascript:.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests containing ?gmap_targeting_search= followed by <script> tags or encoded JavaScript.
  • Referer headers from phishing domains.
• Host IOCs:
  • Unexpected JavaScript execution in browser console.
  • Modified WordPress options or user roles (if admin session hijacked).
• File IOCs:
  • Suspicious entries in WordPress access logs (e.g., GET /?gmap_targeting_search=%3Cscript%3E).

Detection Engineering

YARA Rule

rule CVE_2025_67990_Reflected_XSS {
    meta:
        description = "Detects reflected XSS attempts against GMap Targeting plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-67990"
    strings:
        $payload1 = "gmap_targeting_search="
        $payload2 = "<script>"
        $payload3 = "onerror="
        $payload4 = "javascript:"
    condition:
        any of ($payload*) and filesize < 10KB
}

Sigma Rule

title: Reflected XSS Attempt Against GMap Targeting Plugin
id: 8a4b3c2d-1e5f-4a7b-9c8d-0e1f2a3b4c5d
status: experimental
description: Detects HTTP requests with XSS payloads targeting the GMap Targeting plugin
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-uri-query|contains: "gmap_targeting_search="
        cs-uri-query|contains|any:
            - "<script>"
            - "onerror="
            - "javascript:"
    condition: selection
falsepositives:
    - Legitimate use of search functionality with special characters
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-67990 Reflected XSS in GMap Targeting"; flow:to_server,established; content:"gmap_targeting_search="; http_uri; content:"<script>"; http_uri; classtype:web-application-attack; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate Action: Disable or remove the GMap Targeting plugin until a patch is released.
2. Virtual Patching: Use a WAF to block requests containing gmap_targeting_search= with suspicious patterns.
3. Code Fix: If you have access to the source code, apply output encoding using esc_html() and input sanitization using sanitize_text_field().
4. User Education: Train users to avoid clicking suspicious links, especially those containing query parameters.
5. Monitor: Continuously monitor for plugin updates from the vendor or WordPress repository.

Valters IT – Securing Digital Frontiers